350+ Nouns That Start With O (All Types and Pictures)

350 Nouns That Start With O

noun 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

nouns that start with o picture 1 nouns that start with o picture 3

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Last updated on March 19th, 2023 at 09:57 am