350 Nouns That Start With O
A noun is a word that represents a person, place, thing, or idea. Nouns can be classified into different types, including proper nouns, common nouns, Countable nouns, and Uncountable nouns.
List of Nouns That Start With O
Below is the list of nouns starting with o:
Nouns Beginning With OA
- oakum
- oar
- oatcake
- oad
- oast
- oarfish
- oarfoot
- oak
- oathbreaking
- oath
- oaker
- oarsman
- oaf
- oatmeal
- oasis
- oat
- oarlock
- oarsweed
- oakling
- oaky
Nouns Beginning With OB
- obfirmation
- obelus
- oblateness
- obeah
- obedience
- objurgation
- obdormition
- objection
- obit
- obeisancy
- objectist
- obduredness
- oberration
- obelisk
- oblation
- obfuscation
- obi
- oberon
- obduration
- objective
- obeseness
- objicient
- obduction
- obdureness
- obeyer
- objectiveness
- obdiplostemony
- obduracy
- obelion
- obeisance
- objectivity
- obesity
- obituary
- objector
- obedienciary
- oblationer
- object
- obbe
- objuration
- objectivation
Nouns Beginning With OC
- occurrence
- occasionalism
- oceanus
- ocelot
- occecation
- occult
- occulting
- ochlesis
- ocher
- oca
- occultist
- occurrent
- ochimy
- oceanography
- occultation
- occupancy
- occasion
- ochre
- occiput
- occursion
- occident
- ochymy
- occludent
- occasionality
- occipital
- occamy
- occultness
- ochlocracy
- occupier
- occurse
- occlusion
- occultism
- ochrea
- ocellus
- oceanology
- occasioner
- ocean
- occision
- occupant
- occupation
Nouns Beginning With OD
- odalisque
- odium
- odorament
- odometer
- odontoplast
- odontography
- odelet
- odontogeny
- odometry
- odyssey
- odontalgia
- ode
- odeum
- odontology
- odontolite
- odin
- odyle
- odontalgy
- odeon
- odorline
- odor
- od
- odyl
- odontophore
- odontoblast
- odontograph
- oddity
- odontalgic
- oddness
- odontiasis
- odist
- odmyl
- odontopteryx
Nouns Beginning With OE
- oenanthylidene
- oelet
- oecoid
- oecology
- oenophilist
- oenomania
- oedema
- oes
- oenanthol
- oeillade
- oenocyan
- oenology
- oenanthate
- oestrian
- oenanthone
- oenanthylate
- oestruation
- oeiliad
- oeconomy
- oestrus
- oenanthyl
- oenomel
- oeconomics
- oenometer
- oesophagus
Nouns Beginning With OF
- offset
- offensive
- offcut
- offering
- officialily
- officialty
- off-chance
- offendress
- officiator
- offshoot
- offender
- officialism
- offlet
- offence
- offension
- office
- oftenness
- offertory
- officer
- offer
- off
- offerture
- offense
- offing
- offscum
- offskip
- official
- officiant
- offerer
- officeholder
- off-ramp
- offendant
- offal
- offscouring
Nouns Beginning With OG
- ogdoastich
- ogganition
- ogle
- ogham
- ogress
- ogive
- ogam
- oglio
- ogreism
- ogler
- ogrism
- ogre
- ogee
- ogdoad
Nouns Beginning With OI
- oilman
- oilseed
- oilcloth
- oilskin
- oilstone
- oilbird
- oilery
- oiliness
- oinomania
- oiler
- oidium
- oinement
- oil
- ointment
- oillet
- oilnut
Nouns Beginning With OK
- okenite
- ok
- okra
- oker
- oke
Nouns Beginning With OL
- olfaction
- oleometer
- olivenite
- oleaster
- oleate
- olive
- oldster
- olifant
- oliban
- old
- olein
- oligarch
- oleander
- oleoptene
- oleomargarine
- oliver
- olfactor
- olfactory
- oleone
- oleamen
- oligarchy
- oleoresin
- olio
- olea
- oleandrine
- olf
- oligocene
- oldness
- oleaginousness
- oleograph
- olefine
- oligoclase
- oleosity
- olibanum
- oligosiderite
- olecranon
- olibene
- oldish
- oliva
- oligarchist
Different Types of Nouns Starting With O
Common Nouns That Start With O
- Office Chair
- Oil
- Outlet
- Oven
- Oven Mitt
- Oxygen Tank
Proper Nouns That Start With O
- Ocala National Forest
- Ohio River
- Olympic National Forest
- Olympic National Park
- Orange River
- Oslo
- Ozark National Forest
Countable Nouns That Start With O
- Oar
- Oil Paint
- Onion
- Orange
- Oven
- Oven Cleaner
- Oven Cleaner Spray
- Oven Gloves
- Oven Gloves And Mitts Set
- Oven Knob
- Oven Liner
- Oven Mitt
- Oven Mitts
- Oven Pan
- Oven Rack
- Oven Range
- Oven Thermometer
- Oven Tray
- Overhead Projector
- Owl
Uncountable Nouns That Start With O
- Obedience
- Objectivity
- Obligation
- Obsession
- Obsolescence
- Obstruction
- Occasion
- Occupation
- Oceanography
- Oddity
- Offense
- Oil
- Omnipotence
- Oneness
- Openness
- Opera
- Opportunity
- Oppression
- Optimism
- Option
- Oracle
- Oral
- Order
- Organization
- Orientation
- Originality
- Orthodoxy
- Osmosis
- Otherness
- Outcome
- Outdoors
- Outrage
- Ownership
- Oxygen
Nouns Starting With O – Definition and Example Sentences
Oak: a large, deciduous tree with a broad, spreading crown, often valued for its strong wood.
The oak tree had been growing for over a hundred years.
Oasis: a fertile area in a desert, often with water and vegetation.
The oasis provided a much-needed respite from the hot, dry desert.
Oatmeal: a porridge made from ground oats, often served for breakfast.
She stirred the oatmeal on the stove and added some honey and cinnamon.
Ocean: a vast body of salt water that covers most of the Earth’s surface.
The ocean stretched out as far as the eye could see, its waves crashing against the shore.
Octopus: a sea creature with eight tentacles, a soft body, and a beak-like mouth.
The octopus changed colors and shapes as it swam through the coral reef.
Office: a room or space used for work or business, often with a desk and chairs.
She went to the office to meet with her colleagues.
Oil: a viscous liquid, often derived from petroleum or plants, used for fuel, lubrication, or cooking.
He added a few drops of oil to the pan to cook the vegetables.
Onion: a bulbous vegetable with layers of edible, papery skin, often used in cooking.
She chopped up the onion and added it to the soup.
Opera: a dramatic art form that combines singing, music, and theater, often with elaborate costumes and sets.
The opera singer’s voice filled the concert hall with its power and beauty.
Orchestra: a large ensemble of musicians who play classical music, often with string, brass, woodwind, and percussion instruments.
The orchestra played a beautiful symphony that moved the audience to tears.
Nouns That Start With O – Pictures
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