Most common words in English starting with letter "O"

1.  object
2. objective
3. obligation
4. observation
5. observe
6. observer
7. obtain
8. obvious
9. obviously
10. occasion
11. occasionally
12. occupation
13. occupy
14. occur
15. ocean
16. odd
17. odds
18. of
19. off
20. offense
21. offensive
22. offer
23. office
24. officer
25. official
26. often
27. oh
28. oil
29. ok
30. okay
31. old
32. Olympic
33. on
34. once
35. one
36. ongoing
37. onion
38. online
39. only
40. onto
41. open
42. opening
43. operate
44. operating
45. operation
46. operator
47. opinion
48. opponent
49. opportunity
50. oppose
51. opposite
52. opposition
53. option
54. or
55. orange
56. order
57. ordinary
58. organic
59. organization
60. organize
61. orientation
62. origin
63. original
64. originally
65. other
66. others
67. otherwise
68. ought
69. our
70. ourselves
71. out
72. outcome
73. outside
74. oven
75. over
76. overall
77. overcome
78. overlook
79. owe
80. own
81. owner