All Adjectives that Start with O (Sorted List)

Language, with its oscillating rhythms and ornate expressions, often draws us into its orbit.

Today, our odyssey delves deep into the opulent world of adjectives that originate with the often overlooked letter ‘O’.

In this organized guide, we’ve ordered adjectives based on their number of letters, ensuring an optimal browsing experience. But the journey doesn’t end there!

We further shine a spotlight on the top 100 ‘O’ adjectives, enriching each with a clear definition and an illustrative example to provide context.

As we advance, we’ll unearth adjectives perfectly poised to portray personalities, oscillating between the optimistic positives and the ominous negatives.

For orators, writers, and anyone with an ounce of curiosity about the English language, this exploration promises a plethora of ‘O’-inspired revelations. Are you ready to be overtaken by the allure of ‘O’? Let’s set sail!

Also, Check More Adjectives A-Z:

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Table of Contents

All Adjectives that Start with O (Sorted by Number of Letters)

Launching our deep dive, we first present ‘O’ adjectives, systematically organized by length. Traverse through this orderly array, discovering the diverse nuances each word offers.

2 Letter Adjectives that Start with O

3 Letter Adjectives that Start with O

4 Letter Adjectives that Start with O

Odic
Oily
Okay
Olde
Only
Onyx
Oofy
Oozy
Open
Oral
Otic
Oval
Over
Ovid
Ower

5 Letter Adjectives that Start with O

Oaken
Obedt
Obese
Ocher
Ochre
Octal
Ohmic
Olden
Older
Oleic
Olent
Olive
Omani
Onkus
Onlie
Ontic
Optic
Ossom
Other
Otter
Outer
Ovate
Overt
Owing
Owned

6 Letter Adjectives that Start with O

Oafish
Oblate
Oblike
Oblite
Oblong
Obtuse
Occult
Octoic
Octoid
Ocular
Oddish
Odinic
Odious
Offish
Ogival
Oldest
Oldish
Oleose
Omasal
Omotic
On-air
Oniony
Oniric
Onlest
Online
On-off
Onside
Onsite
Onward
Opaque
Opened
Opiate
Orange
Orangy
Orcish
Ordeal
Orient
Orkish
Ornate
Ornery
Oroqen
Orphic
Oscine
Osteal
Ostial
Outcut
Outlaw
Overly
Ovular
Owlish
Oxalic
Oxeyed

7 Letter Adjectives that Start with O

Obliged
Oblimin
Oblique
Obscene
Obscure
Obverse
Obvious
Occluse
Oceanic
Ocellar
Ochrous
Ocreate
Octopic
Octuple
Odds-on
Odorant
Odorous
Oedipal
Oestral
Off-air
Offbeat
Offduty
Offhand
Off-key
Offline
Off-put
Offside
Offsite
Ogreish
Old-hat
Oldline
Olivary
Olympic
Omakase
Ominous
Omnibus
One-day
Oneiric
One-off
One-pot
Onerous
Onetime
One-way
Ongoing
On-hand
Onioned
On-line
On-road
Onshore
On-site
Onstage
Onymous
Oolitic
Opacous
Opaline
Opencut
Opening
Operant
Operose
Opposed
Opsonic
Optical
Optimal
Optimum
Opulent
Orangey
Orbital
Orbless
Orblike
Ordered
Orderly
Ordinal
Orectic
Organic
Orotund
Osmolar
Osmotic
Osseous
Osteoid
Outback
Outbred
Outcast
Outdate
Outdoor
Outland
Outmost
Outside
Outsize
Outward
Ovaloid
Ovarian
Ovation
Overage
Overall
Overapt
Overarm
Overdue
Overfed
Overful
Overish
Overnew
Oversea
Oviform
Oxblood
Ox-eyed
Oxonian
Oxyntic

8 Letter Adjectives that Start with O

Obdurant
Obdurate
Obedible
Obedient
Obeisant
Obituary
Obligate
Obliging
Obliquid
Observed
Obsessed
Obsolete
Occluded
Occlusal
Occulent
Occultic
Occupied
Ochreous
Octacore
Octanoic
Octonary
Octopean
Octopian
Octopine
Octopoid
Odd-toed
Odontoid
Odorless
Odourful
Oestrous
Off-base
Off-beam
Off-book
Offended
Off-hand
Official
Off-line
Off-peak
Off-road
Off-sale
Offshore
Offsides
Off-site
Offstage
Old-line
Old-time
Olefinic
Oliguric
Olympian
Omissive
Omphalic
Oncoming
One-eyed
One-half
One-note
One-shot
Onesided
One-stop
One-time
On-going
On-scene
Onscreen
On-stage
Opacular
Openable
Open-air
Opencast
Operable
Operatic
Ophidian
Opponent
Opposing
Opposite
Optative
Optional
Optronic
Oracular
Orangish
Orbitary
Orbitual
Ordained
Ordinary
Ordinate
Ordurous
Orgasmic
Orgastic
Orgulous
Oriental
Oriented
Original
Orinasal
Orinocan
Orogenic
Oronasal
Orphaned
Orthodox
Oscitant
Ossified
Ototoxic
Outboard
Outbound
Outdated
Outflung
Outgoing
Outlawed
Outlined
Outlying
Outmoded
Outraged
Outright
Outshore
Outsized
Overaged
Overawed
Overbold
Overbusy
Overcast
Overclad
Overdone
Overfond
Overfree
Overfull
Overhand
Overhead
Overjust
Overkeen
Overland
Overmuch
Overneat
Overnice
Overrank
Overrash
Overread
Overripe
Overseas
Oversewn
Overshot
Oversize
Overslow
Oversoft
Oxygenic
Oxytocic

9 Letter Adjectives that Start with O

Obeisaunt
Objective
Objectual
Obligated
Oblivious
Obnoxious
Obscurant
Observant
Observing
Obsessive
Obsoleter
Obstetric
Obstinant
Obstinate
Obstruent
Obtrusive
Obviating
Occipital
Occlusive
Occultive
Occurrent
Oceanward
Ocellated
Octabasic
Octagonal
Octameric
Octoploid
Octopodal
Octopolar
Odiferous
Odobenine
Odometric
Odourless
Oecumenic
Offending
Offensive
Off-field
Off-guard
Officiary
Officinal
Officious
Off-piste
Offscreen
Off-track
Off-white
Old-world
Oleaceous
Oleanolic
Olfactive
Olfactory
Oligaemic
Olivelike
Omissible
Omophagic
Omphacine
Onanistic
On-camera
On-campus
Oncogenic
Oncologic
One-armed
One-fifth
One-ninth
One-piece
One-sided
One-sixth
One-tenth
One-third
One-touch
One-track
Onionless
Onionlike
Onlooking
Onomastic
Onrushing
On-screen
Ontologic
Opacating
Open-book
Open-eyed
Open-plan
Operating
Operative
Opercular
Opportune
Opposable
Oppressed
Opthalmic
Optimific
Optomotor
Optotypic
Oratorial
Oratorian
Orbicular
Orderable
Oregonian
Orgiastic
Orienting
Origenian
Origenist
Originary
Orolabial
Orosirian
Orthoepic
Orthoptic
Ossicular
Ostensive
Otherwise
Otoscopic
Otterless
Otterlike
Outcoming
Outdoorsy
Outermost
Outfitted
Outgunned
Outspoken
Outspread
Ovenproof
Overalert
Overalled
Overblown
Overclear
Overclose
Overdoped
Overdosed
Overeager
Over-fond
Overfussy
Overgrown
Overhasty
Overhyped
Overjoyed
Overladen
Overlarge
Overlying
Overnight
Overproof
Overproud
Overraced
Overready
Over-ripe
Oversexed
Oversized
Oversolar
Overtight
Overtired
Overwater
Ovigerous
Oviparous
Ownerless
Oxyacetic

10 Letter Adjectives that Start with O

Objectless
Obligatory
Obsequious
Observable
Obstacular
Obstetrick
Obstructed
Obtainable
Occasional
Occidental
Occultural
Occupiable
Octacyclic
Octahedral
Octangular
Octogynous
Octonionic
Octopodous
Octopoidal
Oedematous
Oenophilic
Off-campus
Off-center
Off-colour
Off-kilter
Off-limits
Offputting
Off-screen
Off-street
Off-target
Old-growth
Old-school
Oleaginous
Oleophilic
Oleophobic
Oleraceous
Oligarchic
Oligomeric
Oligosemic
Ommatidial
Omnipotent
Omniscient
Omnivorous
Omophagous
Omosternal
Omphacitic
One-eighth
One-fourth
One-handed
One-legged
One-on-one
One-to-one
On-the-job
Opalescent
Open-armed
Open-ended
Open-faced
Opensource
Opephoroid
Operculate
Ophiolitic
Oppilative
Oppositive
Oppressive
Optimistic
Oratorical
Orbiculate
Orchestral
Organismal
Organismic
Orientated
Originable
Originless
Ornamental
Orogastric
Orogenital
Orographic
Orolingual
Orological
Oromucosal
Orosensory
Orthogenic
Orthogonal
Orthograde
Orthopedic
Orthotopic
Osculating
Osculatory
Osmobiotic
Osmometric
Ossiculate
Ossiferous
Ostensible
Osteogenic
Outclassed
Outdacious
Outflowing
Outjutting
Outlandish
Outrageous
Ouvrierist
Oven-proof
Overactive
Overbanked
Overbooked
Overcoated
Overcoming
Overdamped
Overgreedy
Overhanded
Overheated
Overjoyous
Overloaded
Overlooked
Overmighty
Overmodest
Overpriced
Overracked
Over-rated
Overriding
Oversnowed
Overstated
Overstrung
Overturned
Overweight

11 Letter Adjectives that Start with O

Obediential
Obfuscatory
Objectional
Oblationary
Obliterable
Obliterated
Obsessional
Obsignatory
Obsolescent
Obstetrical
Obstructive
Occlusional
Occulomotor
Occultistic
Ocean-going
Octolateral
Octolocular
Octonocular
Octopartite
Odometrical
Odoriferous
Oecumenical
Oenological
Oestrogenic
Offenceless
Off-putting
Off-the-peg
Old-maidish
Oleographic
Oligosaline
Omnipresent
Omohyoidean
Omphalinoid
Oncogenetic
Oncogenomic
Oncological
One-quarter
One-seventh
Onirocritic
On-the-spot
Ontogenetic
Ontological
Opacifiable
Open-handed
Open-hearth
Open-minded
Opensightly
Operational
Operculated
Opinionated
Opportunist
Opprobrious
Optokinetic
Optothermal
Orientating
Origenistic
Originative
Orthodontic
Orthologous
Orthometric
Orthostatic
Orthotropic
Oscillating
Oscillatory
Os-specific
Osteopathic
Out of work
Out-and-out
Out-of-body
Out-of-date
Out-of-town
Out-of-work
Outstanding
Overanxious
Overbearing
Overcareful
Overcharged
Overclaimed
Overclothed
Overcoached
Overcounted
Overcurious
Overdressed
Overexcited
Overexerted
Overexposed
Overflowing
Overfocused
Overforward
Overfraught
Overfriezed
Overintense
Overionized
Overjealous
Overjittery
Overlayered
Overmuscled
Overnighter
Overplayful
Over-polite
Overrefined
Overserious
Oversparred
Oversteered
Overstuffed
Overuniform
Overvaliant
Overweening
Overwhelmed
Overwrought
Overzealous
Ovulational

12 Letter Adjectives that Start with O

Object-based
Obligational
Obliterative
Obstreperous
Occupational
Octacosanoic
Octogenarian
Octopetalous
Octosyllabic
Off-broadway
Off-the-ball
Off-the-cuff
Off-the-rack
Off-the-wall
Oft-repeated
Oldfashioned
Oleochemical
Oleoresinous
Oligarchical
Oligotrophic
Once-removed
One-gallused
Onomatopoeic
Onygenaceous
Open-hearted
Open-mouthed
Oppositional
Oppressional
Opuntiaceous
Orchestrated
Ornithogenic
Orographical
Orthogenetic
Orthognathic
Orthorhombic
Ostentatious
Osteogenetic
Osteoporotic
Ostrich-like
Out-of-court
Out-of-order
Out-of-print
Out-of-state
Overabundant
Overachiever
Overbreathed
Overburdened
Overcautious
Overcoatless
Overcritical
Overdelicate
Overdominant
Overdramatic
Overeducated
Overemphatic
Overexerting
Overextended
Overfamiliar
Overfatigued
Overforceful
Overforested
Overfragrant
Overfrequent
Overfriendly
Overfruitful
Overgenerous
Overindebted
Overinvested
Overinvolved
Overjubilant
Overlookable
Overreaching
Overreactive
Oversmoothed
Overspecific
Overspeeding
Over-the-top
Overtroubled
Overtrusting
Overturnable
Overwhelming
Over-zealous

13 Letter Adjectives that Start with O

Objectionable
Objectionable
Observational
Obstetricious
Obtuse-angled
Off-the-shelf
Old-fashioned
Oligopolistic
Oligosynaptic
Oligotrichous
Open-and-shut
Opportunistic
Orientational
Other-worldly
Out-of-pocket
Overachieving
Overattentive
Overcivilized
Overcluttered
Overcommitted
Overconcerned
Overconfident
Overconscious
Overdependent
Overdeveloped
Over-educated
Overemotional
Overexcitable
Overfreighted
Overfulfilled
Overfurnished
Overinclusive
Overmastering
Overmotivated
Overqualified
Over-reactive
Oversensitive
Overtouristed

14 Letter Adjectives that Start with O

Octopaminergic
Off-the-record
Operationalist
Optoelectronic
Optospintronic
Ornithological
Ornithophilous
Osteoarthritic
Out-of-context
Out-of-service
Overaggressive
Overdetermined
Overdocumented
Over-elaborate
Overoptimistic
Over-sensitive
Oversimplistic
Oversocialized
Oversolicitous
Overstimulated
Oversubscribed
Oversuspicious

15-17 Letter Adjectives that Start with O

Object-oriented
Obstacle-ridden
Overcomplicated
Overconsiderate
Overpessimistic
Off-the-shoulder
Out-of-character
Overenthusiastic
Over-the-counter
Overconscientious
Oversophisticated

Top 100 Adjectives That Start With O (Sorted Alphabetically)

Delving deeper, we bring forth a curated collection of the most outstanding ‘O’ descriptors. Immerse yourself in this alphabetic assortment, showcasing the cream of the ‘O’ adjective crop.

1. Obdurate

Meaning: Stubbornly refusing to change one’s opinion.

Example: His obdurate attitude frustrated his peers.

2. Objective

Meaning: Unbiased; not influenced by personal feelings.

Example: The scientist remained objective throughout the experiment.

3. Obligatory

Meaning: Required by law or rules.

Example: Attendance at the meeting is obligatory.

4. Oblivious

Meaning: Not aware of or concerned about surroundings.

Example: She was oblivious to the chaos around her.

5. Obscene

Meaning: Offensive or disgusting by accepted standards.

Example: The movie was banned due to its obscene content.

6. Obscure

Meaning: Not discovered or known about.

Example: The artist remained obscure despite his talent.

7. Obsequious

Meaning: Overly eager to please or obey.

Example: The assistant’s obsequious behavior was off-putting.

8. Observant

Meaning: Quick to notice things.

Example: Being observant is key for a detective.

9. Obsessive

Meaning: Excessive preoccupation with something.

Example: His obsessive interest in the topic concerned his friends.

10. Obsolete

Meaning: Out of date, no longer in use.

Example: Floppy disks are now considered obsolete.

11. Obstinate

Meaning: Stubbornly refusing to change one’s opinion.

Example: His obstinate demeanor made negotiations difficult.

12. Obtuse

Meaning: Annoyingly insensitive or slow to understand.

Example: The joke went over his obtuse mind.

13. Obvious

Meaning: Easily perceived or understood.

Example: The answer to the riddle was obvious.

14. Occasional

Meaning: Happening or encountered infrequently.

Example: We made occasional visits to the museum.

15. Ocular

Meaning: Related to the eyes or vision.

Example: The disease had ocular symptoms.

16. Odious

Meaning: Extremely unpleasant or repulsive.

Example: The crime was particularly odious.

17. Odorless

Meaning: Free from or lacking odor.

Example: The gas is dangerous because it’s odorless.

18. Offbeat

Meaning: Unconventional; different from the ordinary.

Example: He had an offbeat sense of humor.

19. Offensive

Meaning: Causing someone to feel resentful or upset.

Example: The joke was considered offensive by many.

20. Offhand

Meaning: Ungraciously or offensively nonchalant.

Example: His offhand remarks hurt her feelings.

21. Officious

Meaning: Assertive of authority in an annoyingly domineering way.

Example: The security guard was overly officious during the event.

22. Oily

Meaning: Covered or saturated with oil.

Example: The oily texture of the food was unappealing.

23. Ominous

Meaning: Giving the impression that something bad will happen.

Example: Dark clouds gave an ominous sign of an impending storm.

24. Omnipotent

Meaning: Having unlimited power; all-powerful.

Example: In many religions, the deity is considered omnipotent.

25. Omnipresent

Meaning: Present everywhere at the same time.

Example: Technology is almost omnipresent in modern society.

26. One-dimensional

Meaning: Lacking depth or complexity.

Example: Critics described the character as one-dimensional.

27. Onerous

Meaning: Involving a burdensome amount of effort.

Example: The onerous task took hours to complete.

28. Opaque

Meaning: Not able to be seen through; not transparent.

Example: The windows were opaque, ensuring privacy.

29. Open-minded

Meaning: Willing to accept new ideas.

Example: It’s essential to be open-minded when learning about other cultures.

30. Operatic

Meaning: Relating to opera; exaggerated or theatrical.

Example: The singer had an operatic voice.

31. Operational

Meaning: In or ready for use; functioning.

Example: The system is now operational.

32. Opportune

Meaning: Well-chosen or particularly favorable.

Example: It was an opportune moment to make the announcement.

33. Opportunistic

Meaning: Exploiting immediate opportunities, especially at the expense of others.

Example: The opportunistic thief took advantage of the situation.

34. Opposite

Meaning: Totally different; in contrast.

Example: The two colors are opposite on the color wheel.

35. Oppressive

Meaning: Unjustly inflicting hardship.

Example: The regime was known for its oppressive tactics.

36. Optimistic

Meaning: Hopeful and confident about the future.

Example: She remains optimistic despite the challenges.

37. Optimum

Meaning: Most conducive to a favorable outcome.

Example: This temperature provides the optimum conditions for growth.

38. Opulent

Meaning: Rich and luxurious.

Example: The mansion was decorated in an opulent style.

39. Oral

Meaning: Relating to the mouth.

Example: The medicine is for oral administration.

40. Orchestral

Meaning: Relating to an orchestra.

Example: The orchestral performance was breathtaking.

41. Orderly

Meaning: Neatly and methodically arranged.

Example: The room was orderly with everything in its place.

42. Organic

Meaning: Derived from living matter; free from pesticides or synthetic chemicals.

Example: We prefer organic fruits and vegetables for our meals.

43. Organizational

Meaning: Relating to the arrangement or structure of something.

Example: His organizational skills are impressive.

44. Ornamental

Meaning: Serving or intended as an ornament; decorative.

Example: The ornamental vase was the centerpiece of the room.

45. Ornate

Meaning: Made in an intricate shape or decorated with complex patterns.

Example: The ornate carvings on the temple walls were mesmerizing.

46. Orthodox

Meaning: Conforming to what is generally accepted as right or true.

Example: His beliefs are quite orthodox for his community.

47. Oscillating

Meaning: Moving back and forth at regular intervals.

Example: The oscillating fan provided relief from the heat.

48. Ostentatious

Meaning: Characterized by vulgar or pretentious display.

Example: The billionaire’s ostentatious mansion was hard to ignore.

49. Ostracized

Meaning: Excluded from a group or society.

Example: After expressing his controversial opinions, he felt ostracized.

50. Outdated

Meaning: Old-fashioned; not current.

Example: Those shoes are quite outdated now.

51. Outermost

Meaning: Furthest from the center or a particular point.

Example: We live on the outermost edge of the city.

52. Outgoing

Meaning: Friendly and socially confident.

Example: His outgoing personality made him popular in school.

53. Outlandish

Meaning: Looking or sounding bizarre or unfamiliar.

Example: The artist is known for her outlandish costumes.

54. Outlined

Meaning: Clearly depicted or delineated.

Example: The plans were clearly outlined in the document.

55. Outrageous

Meaning: Shockingly bad or excessive.

Example: The comedian made some outrageous jokes.

56. Outstanding

Meaning: Exceptionally good; prominent.

Example: She is an outstanding performer in her field.

57. Outward

Meaning: Relating to external appearances or behavior.

Example: His outward demeanor was calm, but he was nervous inside.

58. Oval

Meaning: Having a rounded and slightly elongated shape.

Example: She wore a necklace with an oval pendant.

59. Overbearing

Meaning: Dominating or tyrannical; overwhelmingly powerful.

Example: His overbearing attitude made it difficult for others to voice opinions.

60. Overdue

Meaning: Not having arrived, happened, or been settled by the expected time.

Example: The library book is overdue, and I’ll have to pay a fine.

61. Overjoyed

Meaning: Extremely happy or delighted.

Example: She was overjoyed to hear the good news.

62. Overloaded

Meaning: Loaded with too much weight or more than the capacity.

Example: The truck was overloaded with goods.

63. Overlooked

Meaning: Failed to notice; disregarded.

Example: Her contributions were often overlooked by her superiors.

64. Overpowering

Meaning: Too intense or strong to bear.

Example: The perfume’s scent was overpowering.

65. Oversized

Meaning: Larger than the usual or standard size.

Example: She wore an oversized sweater for comfort.

66. Overt

Meaning: Done or shown openly or plainly.

Example: His disdain for the project was overt.

67. Overwhelmed

Meaning: Having strong emotional effect; buried or drowned beneath a huge mass.

Example: She felt overwhelmed by the outpouring of support.

68. Oxidized

Meaning: Combined chemically with oxygen.

Example: The metal was oxidized after years of exposure.

69. Paced

Meaning: Moving or progressing at a particular rate or speed.

Example: The race was paced evenly from the start.

70. Painful

Meaning: Causing or affected by pain.

Example: The recovery after the surgery was painful.

71. Palatable

Meaning: Pleasant to taste; acceptable or satisfactory.

Example: The meal was palatable, though not exceptional.

72. Pale

Meaning: Light in color or having little color.

Example: The fabric was a pale shade of blue.

73. Pallid

Meaning: Pale, typically because of poor health.

Example: After the illness, he looked quite pallid.

74. Palpable

Meaning: Able to be touched or felt; obvious.

Example: The tension in the room was palpable.

75. Panoramic

Meaning: Providing a wide view.

Example: The hotel room offered a panoramic view of the sea.

76. Parallel

Meaning: Side by side and having the same distance continuously between them.

Example: The two lines are parallel to each other.

77. Paralyzed

Meaning: Partially or wholly incapable of movement.

Example: The accident left him paralyzed from the waist down.

78. Paramount

Meaning: More important than anything else; supreme.

Example: Safety is of paramount importance.

79. Paranoid

Meaning: Extremely suspicious, worried, or fearful.

Example: She felt paranoid about being followed.

80. Parched

Meaning: Extremely dry because of hot weather or lack of water.

Example: After the long walk, he felt parched.

81. Orderly

Meaning: Neatly and methodically arranged.

Example: The files were orderly organized in the cabinet.

82. Organic

Meaning: Related to or derived from living matter.

Example: She prefers to eat organic produce.

83. Original

Meaning: Present or existing from the beginning; first or earliest.

Example: The original manuscript is preserved in the museum.

84. Ornate

Meaning: Made in an intricate shape or decorated with complex patterns.

Example: The ornate jewelry caught everyone’s attention.

85. Ostensible

Meaning: Appearing as such but not necessarily so.

Example: His ostensible reason for the visit was work, but he wanted to see her.

86. Outlandish

Meaning: Looking or sounding bizarre or unfamiliar.

Example: His theories were often considered outlandish.

87. Outspoken

Meaning: Frank in stating one’s opinions.

Example: She was an outspoken advocate for human rights.

88. Overarching

Meaning: Comprehensive or all-encompassing.

Example: The overarching theme of the conference was sustainability.

89. Overcast

Meaning: Covered with clouds; gloomy.

Example: The day was gray and overcast.

90. Overconfident

Meaning: More confident than is justified.

Example: Being overconfident can sometimes lead to mistakes.

91. Overflowing

Meaning: Being full to the point of running over.

Example: The river was overflowing after the heavy rains.

92. Overgrown

Meaning: Covered with plants that have grown in an uncontrolled way.

Example: The garden was wild and overgrown.

93. Overlapping

Meaning: Extend over so as to cover partly.

Example: The two meetings are overlapping, so I’ll be late.

94. Overrated

Meaning: Have a higher opinion of (someone or something) than is deserved.

Example: Many believe that certain celebrities are overrated.

95. Overt

Meaning: Done or shown openly.

Example: The company’s overt support for the charity was commendable.

96. Overzealous

Meaning: Excessively enthusiastic or passionate.

Example: His overzealous approach sometimes turned people off.

97. Ovoid

Meaning: Egg-shaped.

Example: The pendant had an ovoid design.

98. Owlish

Meaning: Resembling an owl, especially in appearing wise or serious.

Example: His owlish glasses gave him a scholarly appearance.

99. Oxymoronic

Meaning: Combining contradictory terms.

Example: “Jumbo shrimp” is an oxymoronic term.

100. Ozonic

Meaning: Relating to or characteristic of ozone.

Example: There was an ozonic smell in the air after the storm.

Adjectives that Start with O to Describe a Person

Turning our attention to the realm of human character, we explore the ‘O’ words finely crafted for personification. Engage with these evocative terms, each shedding light on distinct facets of individuality.

Oafish
Obedient
Obeisant
Obese
Objectionable
Objective
Obligatory
Obliging
Oblique
Oblivious
Oblong
Obnoxious
Obscene
Obscure
Observable
Observant
Obsessive
Obsolete
Obstinate
Obstructive
Obtainable
Obtrusive
Obtuse
Obvious
Occasional
Occupational
Occupied
Oceanic
Odd
Odd-looking

List of adjectives starting with O

Positive Adjectives that Start with O

Steering toward the sunnier side of language, we unearth uplifting ‘O’ descriptors. Delight in this curated selection, each word radiates optimism and celebrates the brighter aspects of life.

Odiferous
Odious
Odorless
Odorous
Offbeat
Offensive
Offhanded
Official
Officious
Oily
Ok
Okay
Old
Older
Oldest
Old-fashioned
Ominous
Omniscient
Omnivorous
One
One-hour
Onerous
One-sided
Only
Opaque
Open
Opened
Openhanded
Openhearted
Opening
Open-minded
Operable
Operatic
Operational
Operative
Opinionated
Opportune
Opportunistic
Opposable
Opposed
Opposing
Opposite
Oppressive
Optimal
Optimistic

Negative Adjectives that Start with O

Navigating the more somber corridors of description, we present ‘O’ adjectives that convey critique or challenges. Venture into these terms, which offer a reflective insight into life’s occasional shadows.