Words starting with “O”

Rich English vocabulary helps you write interesting sentences. It improves the impact of the writing on the readers. To score good in IELTS, GRE in writing rich vocabulary is must. So learn and practice more to get good grasp on English language. Hope you will find this post really helpful.

(105 Words with Meaning in English)

1. oaf awkward person
2. obdurate unyielding, hardhearted
3. obeisance  homage, deference
4. obelisk  tall column, monument
5. obese  fat
6. obfuscate  bewilder, muddle
7. obituary   eulogy
8. objective  (adj.) unbiased
9. objective   (noun) goal
10. objectivity   impartiality
11. oblation  offering, sacrifice
12. obligatory  required, compulsory
13. oblige   compel
14. obliging  accommodating, considerate
15. oblique   indirect
16. obliquity   perversity
17. obliterate  destroy
18. oblong   elliptical,  oval
19. obloquy   slander
20. obscure  vague, unclear
21. obsequious  fawning, servile
22. obsequy  funeral ceremony
23. observant  watchful
24. obsolete  outdated
25. obstinate   stubborn
26. obstreperous   noisy, unruly
27. obtain  gain possession
28. obtrusive  forward, meddlesome
29. obtuse   stupid
30. obviate  make unnecessary
31. Occident   the West
32. occlude  block
33. occult  mystical, secret, relating to the supernatural or witchcraft
34. octogenarian  person in her eighties
35. ocular  optic, visual
36. ode   poem
37. odious  despicable
38. odoriferous  pleasant odor
39. odyssey   journey
40. offal  inedible parts of a butchered animal
41. offertory  church collection
42. officiate   supervise
43. officious  forward, obtrusive
44. offset  counterbalance
45. ogle   flirt
46. ogre  monster, demon
47. oleaginous   oily
48. oligarchy   aristocracy
49. olio   medley
50. ominous   threatening
51. omnibus  collection, compilation
52. omnipotent   all-powerful
53. omniscient   all-knowing
54. onerous  burdensome
55. onslaught   powerful attack
56. ontology  the study of the nature of existence
57. onus  burden
58. opaque  nontransparent
59. operative   working
60. operetta  musical comedy
61. opiate  narcotic
62. opine  think, express an opinion
63. opportune  well-timed, appropriate
64. oppress  persecute
65. oppressive   burdensome
66. opprobrious  abusive, scornful
67. opprobrium  disgrace
68. oppugn  assail
69. opt  decide, choose
70. optimum  best condition
71. optional   elective
72. opulence   wealth
73. opus  literary work or musical composition
74. oracle  prophet
75. oration   speech
76. orator  speaker
77. orb  sphere
78. orchestrate   organize
79. ordain  appoint
80. orderly  neat, arranged
81. ordinance   law
82. ordnance  artillery
83. orient  align, familiarize
84. orison   prayer
85. ornate  lavishly decorated
86. ornithology  study of birds
87. orthodox conventional
88. oscillate   waver, swing
89. ossify   harden
90. ostensible   apparent, seeming
91. ostentatious   pretentious
92. ostracize   banish, shun
93. otherworldly   spiritual
94. otiose    idle
95. ouster  ejection
96. outmoded  out-of-date
97. outré  eccentric
98. outset beginning
99. ovation applause
100. overrule   disallow
101. overture  advance, proposal
102. overweening  arrogant, forward
103. overwhelm   overpower
104. overwrought   overworked, high- strung
105. ovum   egg, cell