Words That Start With O to Describe Someone: Traits and Adjectives Revealed

Discover a variety of adjectives starting with the letter “O” to accurately describe someone’s personality, appearance, or behavior.

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

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