List of Adjectives Starting With O

List of Adjectives Starting With o

1. Opulent: Displaying great wealth or luxury.
2. Obliging: Willing to do a service or favor; helpful.
3. Obstinate: Stubbornly refusing to change one’s opinion or chosen course of action.
4. Omnipotent: Having unlimited power or authority.
5. Optimistic: Having a positive outlook on situations and expecting favorable outcomes.
6. Oblique: Indirect or not straightforward.
7. Obdurate: Unyielding to persuasion or moral influence.
8. Obsequious: Excessively obedient or attentive to someone important.
9. Onerous: Burdensome or requiring a great amount of effort.
10. Obsolete: No longer in use or outdated.
11. Obfuscating: Making something unclear or difficult to understand.
12. Oceanic: Relating to the ocean; vast like an ocean.
13. Oscillating: Moving back and forth in a regular rhythm.
14. Ornate: Elaborately decorated; highly detailed.
15. Obnoxious: Extremely unpleasant or offensive.
16. Overwhelming: Intense or overpowering in effect.
17. Olfactory: Related to the sense of smell.
18. Oblique: Slanting or inclined at an angle.
19. Ostentatious: Intended to attract attention; showy.
20. Outlandish: Strange, bizarre, or unconventional.
21. Obvious: Easily perceived or understood.
22. Overdue: Not done or received by the expected time.
23. Operose: Involving much labor or effort.
24. Opalescent: Displaying a play of colors like that of an opal.
25. Outspoken: Frank and unreserved in speech.
26. Oblivious: Unaware or unconscious of what is happening around.
27. Organic: Relating to or derived from living matter.
28. Overjoyed: Extremely happy or delighted.
29. Overzealous: Excessively enthusiastic or fervent.
30. Obdurate: Hardened in feelings; resistant to persuasion.
31. Outrageous: Shockingly bad or excessive.
32. Outgoing: Friendly and sociable; extroverted.
33. Opalescent: Reflecting a milky iridescence.
34. Orotund: Pompous or pretentious in speech.
35. Overdue: Not paid, received, or done on time.
36. Onerous: Involving a burdensome amount of effort.
37. Obstructive: Tending to block or hinder progress.
38. Overcast: Cloudy or darkened, often describing the sky.
39. Onomatopoeic: Imitating the natural sound associated with the object or action it refers to.
40. Opalescent: Having a milky iridescence like that of an opal.
41. Ossified: Turned into bone or become rigid.
42. Orthodox: Conforming to established doctrine, especially in religion.
43. Oscillating: Moving back and forth regularly.
44. Officious: Intrusively enthusiastic in offering help or advice.
45. Overbearing: Unpleasantly overpowering in manner or force.
46. Overconfident: Excessively confident; too sure of oneself.
47. Outrageous: Exceeding the bounds of what is usual or proper.
48. Outmoded: No longer in fashion or use; outdated.
49. Oblique: Slanting or inclined at an angle.
50. Overcast: Covered with clouds; cloudy.