Discover a variety of adjectives starting with the letter “O” to accurately describe someone’s personality, appearance, or behavior.
- Optimistic- Hopeful and confident about the future.
- Organized- Arranged or structured in a systematic way.
- Outgoing- Sociable and eager to meet new people.
- Obedient- Complying or willing to comply with orders or requests.
- Objective- Not influenced by personal feelings or opinions.
- Observant- Quick to notice things.
- Opinionated- Holding stubbornly to one’s own ideas or opinions.
- Original- Fresh and unusual; not derivative.
- Orderly- Neatly and methodically arranged.
- Outspoken- Frank in stating one’s opinions, especially if they are critical.
- Outstanding- Exceptionally good.
- Omniscient- Knowing everything.
- Outlandish- Looking or sounding bizarre or unfamiliar.
- Ostentatious- Characterized by vulgar or pretentious display.
- Opulent- Ostentatiously rich and luxurious.
- Onerous- Involving an amount of effort and difficulty that is oppressively burdensome.
- Obliging- Eager to help or please others.
- Overbearing- Unpleasantly or arrogantly domineering.
- Open- minded** – Willing to consider new ideas; unprejudiced.
- Ornery- Bad-tempered and combative.
- Oriented- Aligned or positioned in a particular way.
- Oracular- Relating to an oracle; prophetic.
- Opportunistic- Exploiting immediate opportunities, especially regardless of planning or principle.
- Obstinate- Stubbornly refusing to change one’s opinion or action, despite attempts to persuade one to do so.
- Oblivious- Not aware of or concerned about what is happening around one.
- Offbeat- Unconventional; different from what is usual.
- Overwhelmed- Deeply affected, overloaded, or stressed.
- Overjoyed- Extremely happy or joyful.
- Oafish- Stupid, uncultured, or clumsy.
- Overzealous- Too zealous in one’s attitude or behavior.
- Operatic- Exaggerated and dramatic in style or manner.
- Opalescent- Showing varying colors as the angle of view changes.
- Operative- Functioning, having effect.
- Old- fashioned** – Favoring traditional or conservative styles or ideas.
- Officious- Assertive of authority in an annoyingly domineering way.
- Ornate- Elaborately or highly decorated.
- Obliterate- Destroy utterly; wipe out.
- Overflowing- Exceeding the bounds; excessive.
- Opaque- Not transparent or translucent; hard to understand.
- Optimal- Best or most favorable; optimum.
- Oscillating- Moving or swinging back and forth in a regular rhythm.
- Odious- Extremely unpleasant; repulsive.
- Oblique- Neither parallel nor at a right angle to a specified or implied line; slanting.
- Oily- Containing oil; excessively suave or ingratiating.
- Obnoxious- Extremely unpleasant.
- Outmoded- Old-fashioned.
- Overdue- Not having arrived, happened, or been done by the expected time.
- Overt- Done or shown openly; not secret or hidden.
- Outraged- Very shocked and angry.
- One- of-a-kind** – Unique, unlike anything or anyone else.
- Oracular- Resembling an oracle in some prophetic or authoritative way.
- Outsmart- To defeat or get the better of someone by being clever or cunning.
- Obtuse- Annoyingly insensitive or slow to understand.
- Overexcited- Excessively excited.
- Oversimplified- Overly simple, to the extent of ignoring complexities.
- Omnipotent- Having unlimited power; able to do anything.
- Odoriferous- Giving off a strong smell.
- Outgoing- Friendly and socially confident.
- Opinionated- Expressing strong beliefs or judgments about something.
- Omnivorous- Feeding on both animal and vegetable substances.
- Overpowering- Overwhelming or very intense.
- Offhand- Ungraciously or offensively nonchalant or cool in manner.
- Outlandish- Looking or sounding bizarre or unfamiliar; strange.
- Octogenarian- A person who is from 80 to 89 years old.
- Omnipresent- Widely or constantly encountered; common or widespread.
- Orthodox- Conforming to established doctrine especially in religion.
- Omniscient- Knowing everything; having unlimited awareness or understanding.
- Opaque- Not able to be seen through; not transparent.
- Outworn- Used to the point of being no longer usable or effective.
- Oppressive- Unjustly inflicting hardship and constraint.
- Oncologic- Pertaining to the study and treatment of tumors.
- Outsized- Exceptionally large.
- Out- of-place** – Not in the correct or usual position or arrangement.