Adjectives that start with O! Adjectives are one of eight parts of speech in the English language that modifies nouns or pronouns in a sentence. There are many adjectives beginning with o, but in this list, we have chosen 480+ adjectives that begin with o. We can also add several prefixes, such as Omni, over and out, etc., to words to make a new adjective starting with O.
Adjectives beginning with o can be divided into the following categories.
1) Personality Adjectives that Start with O, Such as Obsessive, Organized, and Objective
2) Descriptive Adjectives that Start with O, Such as Obtuse, Observant, and Obvious
3) Adjectives that Start with O to Describe a Person, Such as Older, Outlaw, and Outcast
4) Positive Adjectives that Start with O, Such as Obligated, Obtainable, Ok
5) Negative Adjectives that Start with O, Such as Obese, Obligatory and Objectionable
List of Adjectives that Start with O
- Oafish
- Oaked
- Oaken
- Oaky
- Oarless
- Oarlike
- Oat
- Oaten
- Oatlike
- Oaty
- Obconic
- Obdurate
- Obedient
- Obeisant
- Obese
- Obeyable
- Objectionable
- Objective
- Object-Oriented
- Oblatory
- Obligatory
- Obliged
- Obliging
- Oblique
- Oblivious
- Oblong
- Obnoxious
- Obovate
- Obovoid
- Obscene
- Obscure
- Obsequious
- Observable
- Observant
- Obsessed
- Obsessive
- Obsessive-Compulsive
- Obsolescent
- Obsolete
- Obstetric
- Obstinate
- Obstreperous
- Obstructionist
- Obstructive
- Obtainable
- Obtect
- Obtected
- Obtrusive
- Obtuse
- Obviable
- Obvious
- Obvolute
- Occasional
- Occidental
- Occlusal
- Occult
- Occupational
- Occupied
- Oceangoing
- Oceanic
- Ocellar
- Ocellate
- Oceloid
- Ocherish
- Ocheroid
- Ocherous
- Ochery
- Ochreous
- Ochroid
- Ochrous
- Ochry
- Ocreate
- Octadic
- Octal
- Octantal
- Octaval
- Octopoid
- Octuplex
- Ocular
- Odd
- Oddish
- Odds-On
- Odic
- Odious
- Odored
- Odorless
- Odorous
- Odourful
- Odourless
- Odyssean
- Oedipal
- Oedipal
- Oedipean
- Oestrous
- Oestrual
- Off
- Offbeat
- Off-Centre
- Off-Colour
- Off-Duty
- Offending
- Offensive
- Offhand
- Official
- Officious
- Offish
- Offkey
- Off-Limits
- Offline
- Off-Message
- Off-Peak
- Off-Piste
- Off-Putting
- Off-Season
- Offshore
- Offside
- Offstage
- Off-The-Peg
- Offtrack
- Off-White
- Ogeed
- Oghamic
- Ogival
- Ogreish
- Ogrish
- Ohmic
- Oidioid
- Oil-Fired
- Oilproof
- Oiltight
- Oily
- Ok
- Okeydoke
- Old
- Olde
- Olden
- Olde-Worlde
- Old-Fashioned
- Oldish
- Oldish
- Old-School
- Old-Style
- Old-Time
- Oleaginous
- Olefinic
- Oleic
- Olfactory
- Oliguric
- Olivary
- Olivinic
- Olympian
- Olympic
Adjectives that start with Om
- Omani
- Omental
- Ominous
- Omissive
- Omnific
- Omniform
- Omnimode
- Omnipotent
- Omnipresent
- Omniscient
- Omnivorous
- Onboard
- On-Board
- Once-In-A-Lifetime
- Oncoming
- One-Dimensional
- Onefold
- One-Handed
- Oneiric
- One-Off
- One-Person
- Onerous
- Onery
- One-Sided
- One-Size-Fits-All
- One-Star
- One-Stop
- Onetime
- One-Time
- One-To-One
- One-Way
- Ongoing
- Oniony
- Onium
- Onliest
- Online
- Only
- On-Message
- Onomatopoeic
- Onscreen
- Onshore
- Onside
- On-Site
- Onstage
- Ontic
- On-Trend
- Onward
- Oogamous
- Oogonial
- Oolitic
- Oologic
- Oophytic
- Oorie
- Oosporic
- Oothecal
- Oozy
Adjectives that Start with Op
- Opalescent
- Opaque
- Op-Ed
- Open
- Openable
- Open-Air
- Open-And-Shut
- Opencast
- Open-Cut
- Open-Door
- Open-Ended
- Open-Eyed
- Open-Handed
- Open-Hearted
- Opening
- Open-Minded
- Open-Mouthed
- Open-Necked
- Open-Pit
- Open-Plan
- Open-Source
- Open-Top
- Operable
- Operatic
- Operational
- Operative
- Operose
- Ophitic
- Opinionated
- Opportune
- Opportunist
- Opposed
- Opposing
- Opposite
- Oppressed
- Oppressive
- Opprobrious
- Optic
- Optical
- Optimistic
- Optimum
- Optional
- Optronic
- Opulent
- Oracular
- Oral
- Orange
- Orangey
- Orangish
- Orangy
- Oratorical
- Orbital
- Orchestral
- Ordered
- Orderly
- Ordinary
- Ordurous
- Orectic
- Orective
- Organic
- Organizational
- Organized
- Orgasmic
- Orgiac
- Orgiastic
- Orgic
- Orgulous
- Oriental
- Orientated
- Original
- Ornamental
- Ornate
- Ornery
- Ornithic
- Ornithological
- Orogenic
- Orographic
- Orotund
- Orphic
- Orphical
- Orra
- Ortho
- Orthodontic
- Orthodox
- Orthographic
- Orthopaedic
- Oscinine
- Oscitant
- Osculant
- Oscular
- Osiered
- Osmatic
- Osmic
- Osmolal
- Osmolar
- Osmotic
- Osmous
- Osseous
- Ossific
- Ossified
- Osteal
- Osteitic
- Ostensible
- Ostentatious
- Ostiolar
- Otalgic
- Otherwise
- Otherworldly
- Otic
- Otiose
- Otitic
- Otologic
- Ototoxic
- Ourie
- Out-And-Out
- Outbound
- Outdated
- Outdoor
- Outer
- Outermost
- Outgoing
- Outlandish
- Outlying
- Outmoded
- Out-Of-Court
- Out-Of-Town
- Outraged
- Outrageous
- Outré
- Outreach
- Outright
- Outside
- Outsize
- Outspoken
- Outspread
- Outstanding
- Outstretched
- Outward
- Outward-Bound
- Outworn
- Oval
- Ovarial
- Ovarian
- Ovate
- Ovenable
- Ovenlike
- Ovenproof
- Oven-Ready
- Overable
- Overage
- Overaged
- Overapt
- Overarching
- Overarm
- Overbearing
- Overbed
- Overbig
- Overblown
- Overbold
- Overbred
- Overbusy
- Overcast
- Overcold
- Overcoy
- Overcrowded
- Overdear
- Overdeveloped
- Overdone
- Overdrawn
- Overdressed
- Overdue
- Overeager
- Overeasy
- Overfar
- Overfast
- Overfat
- Overfine
- Overfit
- Overfond
- Overfoul
- Overfree
- Overfull
- Overglad
- Overgrown
- Overhand
- Overhanging
- Overhard
- Overhead
- Overheated
- Overhigh
- Overholy
- Overhot
- Overidle
- Overjoyed
- Overjust
- Overkeen
- Overkind
- Overland
- Overlapping
- Overlate
- Overlax
- Overlewd
- Overloaded
- Overlong
- Overloud
- Overlush
- Overmanned
- Overmany
- Overmeek
- Overmild
- Overmuch
- Overnear
- Overneat
- Overnew
- Overnice
- Overnight
- Overpackaged
- Overpaid
- Overpert
- Overpopulated
- Overpowering
- Overpriced
- Overprotective
- Overqualified
- Overrank
- Overrash
- Overrated
- Overrich
- Overriding
- Overrife
- Overripe
- Overrude
- Oversad
- Overseas
- Oversexed
- Oversick
- Oversize
- Overslow
- Oversoft
- Overstaffed
- Overstretched
- Oversubscribed
- Oversure
- Overt
- Overtame
- Overtart
- Over-The-Counter
- Overthin
- Overtired
- Overwary
- Overweak
- Overweening
- Overweight
- Overwhelming
- Overwide
- Overwily
- Overwise
- Overworked
- Ovicidal
- Oviducal
- Oviform
- Ovular
- Owing
- Owlish
- Owllike
- Owly
- Ownable
- Owner-Occupied
- Oxalic
- Oxbridge
- Oxic
- Oxidable
- Oxidasic
- Oxidic
- Oxlike
- Oxo
- Oxy
- Oxygenic
- Ozone-Friendly
- Ozonic
- Ozonous
Related Articles:
- Adjectives that Start with S
- Adjectives that Start with UN
- Adjectives that Start with W
- Adjectives that Start with V
- Adjectives that Start with U
- Adjectives that Start with R
