English Words with “O” to Enrich Your Vocabulary

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 obsolete  outdated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

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