Adjectives That Start With O! Are you searching for the list of common adjectives beginning with letter O? Here is the right page for you to look for a useful list of adjectives starting with an O with ESL infographic.
According to Wikipedia, an adjective is a word that describes a noun. An adjective is a word that gives more information about the noun that goes with it. For examples:
- The sky is blue.
- The joke David told was so funny, I could not stop laughing all day.
Adjectives That Start With O
List of Adjectives Begining with Letter O
- Obdurate
- Obedient
- Obese
- Objective
- Oblate
- Obligate
- Obligated
- Obligatory
- Obliged
- Oblique
- Oblivious
- Oblong
- Obnoxious
- Obscene
- Obscure
- Observable
- Observant
- Observed
- Observing
- Obsessed
- Obsessional
- Obsessive
- Obsolescent
- Obsolete
- Obstetric
- Obstetrical
- Obstinate
- Obstructed
- Obstructive
- Obtainable
- Obtrusive
- Obtuse
- Obviating
- Obvious
- Occasional
- Occidental
- Occipital
- Occlusive
- Occult
- Occupational
- Occupied
- Occurrent
- Oceanic
- Ocellated
- Ocher
- Ochre
- Octagonal
- Octal
- Octangular
- Octuple
- Ocular
- Odd
- Oddish
- Odious
- Odorless
- Odorous
- Odourless
- Oecumenic
- Off
- Offbeat
- Offenceless
- Offended
- Offending
- Offenseless
- Offensive
- Offhand
- Official
- Officious
- Offish
- Offshore
- Offside
- Offsides
- Offstage
- Old
- Olden
- Older
- Oldish
- Oldline
- Oleaceous
- Oleaginous
- Olfactive
- Olfactory
- Olive
- Olivelike
- Olympian
- Olympic
- Omani
- Ominous
- Omissible
- Omissive
- Omnibus
- Omnipresent
- Omniscient
- Oncologic
- Oncoming
- One
- Oneiric
- Onerous
- Onetime
- Ongoing
- Online
- Only
- Onomastic
- Onshore
- Onside
- Onstage
- Ontogenetic
- Ontological
- Onymous
- Opalescent
- Opaline
- Opaque
- Open
- Opencast
- Opencut
- Opened
- Openhanded
- Openhearted
- Opening
- Operable
- Operant
- Operatic
- Operating
- Operational
- Operationalist
- Operative
- Operculate
- Operculated
- Operose
- Ophthalmic
- Opinionated
- Opponent
- Opportune
- Opportunist
- Opposable
- Opposed
- Opposing
- Opposite
- Oppositive
- Oppressed
- Oppressive
- Opprobrious
- Optative
- Optic
- Optical
- Optimal
- Optimistic
- Optimum
- Optional
- Opulent
- Oracular
- Oral
- Orange
- Orangish
- Oratorical
- Orbicular
- Orbiculate
- Orbital
- Orbitual
- Orchestral
- Orchestrated
- Ordained
- Ordered
- Orderly
- Ordinal
- Ordinary
- Organic
- Organised
- Organismal
- Organismic
- Organized
- Orgiastic
- Oriental
- Orientated
- Orientating
- Oriented
- Orienting
- Original
- Originative
- Ornamental
- Ornate
- Ornery
- Orotund
- Orphaned
- Orphic
- Orthodontic
- Orthodox
- Orthogonal
- Orthographic
- Orthopaedic
- Orthoptic
- Orthostatic
- Orwellian
- Oscillating
- Oscillatory
- Oscine
- Oscitant
- Osmotic
- Osseous
- Ossicular
- Ossiculate
- Ossiferous
- Ossified
- Osteal
- Ostensible
- Ostensive
- Ostentatious
- Other
- Otherwise
- Otherworldly
- Ototoxic
- Ottoman
- Outback
- Outboard
- Outbound
- Outbred
- Outcast
- Outclassed
- Outdated
- Outdoor
- Outdoorsy
- Outer
- Outermost
- Outfitted
- Outflowing
- Outgoing
- Outlandish
- Outlaw
- Outlined
- Outmoded
- Outmost
- Outrageous
- Outre
- Outright
- Outside
- Outsize
- Outsized
- Outspoken
- Outspread
- Outstanding
- Outward
- Oval
- Ovarian
- Ovate
- Over
- Overactive
- Overage
- Overaged
- Overall
- Overarm
- Overawed
- Overbearing
- Overblown
- Overbold
- Overbusy
- Overcareful
- Overcast
- Overcautious
- Overconfident
- Overcritical
- Overcurious
- Overdelicate
- Overdone
- Overdressed
- Overdue
- Overeager
- Overemotional
- Overexcited
- Overfamiliar
- Overflowing
- Overfond
- Overfull
- Overgenerous
- Overgreedy
- Overgrown
- Overhand
- Overhanded
- Overhasty
- Overhead
- Overheated
- Overjealous
- Overjoyed
- Overladen
- Overland
- Overlarge
- Overloaded
- Overlooked
- Overlying
- Overmodest
- Overmuch
- Overnice
- Overnight
- Overpowering
- Overpriced
- Overprotective
- Overproud
- Overreaching
- Overrefined
- Overriding
- Overripe
- Oversea
- Overseas
- Oversensitive
- Overserious
- Oversewn
- Oversexed
- Overshot
- Oversize
- Overstated
- Overstuffed
- Oversubscribed
- Oversuspicious
- Overt
- Overturned
- Overvaliant
- Overweight
- Overwhelming
- Overzealous
- Ovoid
- Ovular
- Owlish
- Owned
- Ownerless
- Oxalic
- Oxidative
- Oxidized
Sentence Examples
Obdurate
- He remained obdurate, refusing to alter his decision.
Obedient
- She is an obedient woman.
Obese
- Obese people find it difficult to stop overeating.
Objective
- It is impossible to be completely objective.
Oblate
- The earth is an oblate sphere.
Obligate
- It is an obligate parasite with a complex life cycle.
Obligated
- We were obligated to attend the opening ceremony.
Obligatory
- She was wearing the obligatory sweater and pearl necklace.
Obliged
- I was obliged to abandon that idea.
Oblique
- He made an oblique reference to his work.
Oblivious
- She was oblivious to our warnings.
Oblong
- Battery pods are of two types: square and oblong.
Obnoxious
- He is the most obnoxious man I know.
Obscene
- They have cut the obscene passages from the film to show it on television.
Obscure
- He always speaks in obscure legal jargon.
Observable
- The tendency precipitates into observable motion.
Observant
- You should be observant of the traffic rules.
Overnight
- We stayed overnight with my mother.
Overpowering
- There’s an overpowering smell of garlic in the kitchen.
Overpriced
- These shoes are very nice, but they’re terribly overpriced.
Overprotective
- The children of overprotective parents are sometimes rather neurotic.
Overproud
- He is a man overproud of his success.
Overreaching
- She is known for overreaching her authority.
Overriding
- Their overriding aim was to keep costs low.
Overripe
- The overripe apples dropped down from the trees.
Oversea
- I have an opportunity to go an oversea trip.
Adjectives Starting with O | Infographic
Adjectives that start with O | Image 1
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