Adjectives that Start with O: List of 100+ Adjectives Starting with O in English 1

Adjectives that Start with O: List of 100+ Adjectives Starting with O in English

Adjectives that Start with O! In this section, you will learn a list of common words that start with O in English with ESL picture and example sentences to help you enhance your vocabulary words.

Adjectives that Start with O

List of Adjectives that Start with O

  • Owlish
  • Oviparous
  • Overwrought
  • Overwhelming
  • Overwhelmed
  • Overt
  • Oversensitive
  • Overrated
  • Overjoyed
  • Overconfident
  • Overblown
  • Overactive
  • Ovate
  • Ovarian
  • Oval
  • Outstanding
  • Outspoken
  • Outside
  • Outrageous
  • Outlandish
  • Outgoing
  • Outermost
  • Outer
  • Outdated
  • Outbound
  • Otiose
  • Ostentatious
  • Ostensible
  • Ossified
  • Ornery
  • Ornate
  • Ornamental
  • Original
  • Orgiastic
  • Organized
  • Organic
  • Organdy
  • Ordinary
  • Orderly
  • Orange
  • Opulent
  • Optimistic
  • Optimal
  • Oppressive
  • Opposite
  • Opportune
  • Opinionated
  • Operative
  • Operating
  • Operatic
  • Open-minded
  • Open-handed
  • Open-ended
  • Open
  • Opaque
  • Opalescent
  • Ongoing
  • Onerous
  • Omnivorous
  • Omniscient
  • Omnipresent
  • Omnipotent
  • Ominous
  • Olympic
  • Olive
  • Olfactory
  • Old-fashioned
  • Oldest
  • Older
  • Olden
  • Old
  • Okay
  • Oily
  • Official
  • Offhand
  • Offensive
  • Offbeat
  • Odoriferous
  • Odious
  • Odd
  • Ocular
  • Octogenarian
  • Octagonal
  • Oceanic
  • Occupied
  • Occlusive
  • Occipital
  • Occidental
  • Occasional
  • Obvious
  • Obtuse
  • Obtainable
  • Obstinate
  • Obsolete
  • Obsessive
  • Obsessed
  • Observant
  • Obsequious
  • Obscure
  • Obscene
  • Obnoxious
  • Oblong
  • Oblique
  • Obliging
  • Obligated
  • Oblate
  • Objective
  • Objectionable
  • Obese
  • Obeisant
  • Obedient
  • Obdurate
  • Oaten
  • Oafish

Adjectives that Start with O with Examples

  • He was an owlish man, with little round glasses.
  • Every bird is oviparous, and it is viviparity, however.
  • The heat was overwhelming and people were dropping like flies.
  • Such oversensitive children may have attention problems.
  • He was overjoyed to see his mother again.
  • She was very overactive and had not slept for three nights.
  • The plant has oval green leaves marbled with brownish-purple.
  • These are the prizes given for the most outstanding British theatrical performances of the year.
  • His murder was an outrageous and barbarous act.
  • Sales reps need to be outgoing because they are constantly meeting customers.
  • They criticized the ostentatious lifestyle of their leaders.
  • The ostensible reason for his resignation was ill-health.
  • Hitler’s original plan was to kill off all the German Jews.
  • Cheap organic food is still difficult to come by.
  • The black lettering really stands out on that orange background.
  • The President says she is optimistic that an agreement can be worked out soon.
  • We don’t have any choice, only run in opposite directions.
  • In deciding on an operatic career she hitched her wagon to a star.
  • He was very open-minded about other people’s work.
  • Martha’s a very open-handed, generous person.
  • Girls do better on open-ended tasks that require them to think for themselves.
  • Training is part of our ongoing career development program.
  • This is the most onerous task I have ever undertaken.
  • She has always been an omnivorous reader.
  • There were ominous dark clouds gathering overhead.
  • He had old-fashioned ideas and was easily shocked.
  • Youth is a blunder; manhood a struggle, old age a regret. 
  • The defensive team nearly equipoised the offensive team.

Learn more with words that start with O in English.

Adjectives that Start with O Infographic

Adjectives that Start with O: List of 100+ Adjectives Starting with O in English

Adjectives that Start with O: List of 100+ Adjectives Starting with O in English 2

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