List of adjectives that start with the letter O! Here you will find a wide variety of words to help you better describe the world around you. Whether you are writing a story, a poem, or an essay, these words will help you express yourself more clearly and accurately. So let’s explore the world of O-adjectives!
Positive Adjectives That Start With “O”:
| Operant | Okay | Ordained |
| On | Omnipotent | Observant |
| Operating | Operative | Olympic |
| Organized | Orthodox |
Out-of-this-world
|
| Overall | Online | Opportunist |
| Original | Orchestral | Onetime |
| Ornamental | Optimal | Official |
| Ongoing | Outgoing | One-of-a-kind |
| Orientated | Ornate | Obliging |
| Open-ended | Opulent | Opalescent |
| Oracular | Obedient | Opportunistic |
| Overt | Okay | Optional |
| Openhearted | Observable | Omniscient |
| Openhanded | One | Olympian |
| Optimistic | Orotund | Open |
| Overjoyed | Orderly | Organic |
| Operatic | Opening | Orientating |
| Objective | Opportune | Opaline |
| Operable | Open-hearted | Overabundant |
| Open-minded | Occurrent | Operational |
| Ordered | Obvious | On-going |
| Observational | Over | Opened |
| Omnipresent | Originative | Omnibus |
| Outstanding | Only | Optimum |
| Odds-on | Oriented | Obligated |
| Ok | Omnidirectional | Obtainable |
| Omnicompetent |
Negative Adjectives That Start With “O”:
| Oafish | Outcast | Overactive |
| Oily | Ominous | Obtrusive |
| Oblivious | Occluded | Overblown |
| Obsolete | Oppressive | Occupied |
| Opinionated | Outlaw | Obnoxious |
| Objectionable | Overaged | Oldest |
| Obligational | Onerous | Obscene |
| Occult | Obese | Outlawed |
| Overburdened | Off | Obsessive |
| Odd | Outdated | Obvious |
| Opportunistic | Outmoded | Owing |
| Old | Obstreperous | Obstinate |
| Outraged | Oversimplified | Obscure |
| Opposite | Officious | Overbearing |
| Odious | Opponent | Omissible |
| Obstructive | Obliterable | Offensive |
| Only | Overloaded | Obstructed |
| Obligated | Outclassed | Outrageous |
| Oozy | Obliterated | Opportunist |
| Oblique | Omissive | Ostentatious |
| Obligatory | Obtuse | Obdurate |
Neutral Adjectives That Start With “O”:
| Orange | Older | Obese |
| Offbeat | Outlandish | Obsolete |
| Omnipotent | Opaque | Omniscient |
| Old-fashioned | Operable | Occasional |
| Opposable | Ornamental | Obvious |
| Oily | Oral | Original |
| Orthodox | Ordinary | Omnivorous |
| Odd | Opposing/opposed | Operative |
| Optional | Opposite |
“O” Adjectives To Describe a Person:
| Overfatigued | Overdosed | Odious |
| Overfed | Optimistic | Older |
| Overfulfilled | Oafish | Only |
| Overweight | Outdoorsy | Ornery |
| Overzealous | Openhearted | Omnivorous |
| Ordinary | Overoptimistic | Odd |
| Overdeveloped | Outlaw | Obscure |
| Outmoded | Open | Overcautious |
| Obnoxious | Overcritical | Obsessive |
| Obliging | Okay | Openhanded |
| Obeisant | Outlandish | Over-assertive |
| Opulent | Oversteered | Occupied |
| Outclassed | Ominous | Overbearing |
| Odiferous | Overpowering | Oppressive |
| Overbold | Overbooked | Outdated |
| Outspread | Offhanded | Original |
| Officious | Overinformed | Overrated |
| One | Opinionated | Observant |
| Ok | Overworked |
Overenthusiastic
|
| Outrageous | Ostentatious | Overprotective |
| Overcounted | Outraged | Outgoing |
| Obedient | Omniscient | Overdressed |
| Overburdened | Outcast | Objective |
| Oldest | Oblivious | Offensive |
| Overachieving | Overwrought | Outstanding |
| Outspoken | Overemotional | Overeducated |
| Overexposed | Overactive | Outright |
| Overjoyed | Obese | Objectionable |
| Overcoached | Overwhelming | Orphaned |
| Oversensitive | Odd-looking | Orderly |
| Overextended | Obscene | Oldish |
| Overcommitted | Overcharged | Overqualified |
| Overnighter | Old | Old-fashioned |
| Open-minded | Overconfident | Obstinate |
| Overaggressive | Overexerting | Overwhelmed |
| Overachiever | Opportunistic | One-sided |
| Overambitious | Overexerted |
List of Personality Adjectives that Start with O:
| Overachieving | Overbearing | Overexcited |
| Overwhelmed | Overmodest | Overanxious |
| Oafish | Obedient | Obliging |
| Outgoing | Outraged | Overwrought |
| Objective | Overjoyed | Obnoxious |
| Overfocused | Overzealous | Overcritical |
| Organized | Ostentatious | Overemotional |
| Opinionated | Officious | Optimistic |
| Obsessional | Obsessive | Overindulgent |
| Overconcerned | Obstinate | Overprotective |
This list of adjectives that start with O is a great way to expand your vocabulary and add more description to your writing. With adjectives like obedient, obvious, ornery, and ornate, you can bring more life and detail to any story. Now that you have a better understanding of what adjectives that start with O are, you can confidently include them in your writing.