| No. | Item | Definition |
|---|---|---|
| 1. | 100 percent | completely certain |
| 2. | a given | something certain |
| 3. | absolutely | completely yes |
| 4. | affirmative | yes; certainly |
| 5. | all right | yes; acceptable |
| 6. | assuredly | certainly; definitely |
| 7. | aye | yes |
| 8. | bank on it | be certain of it |
| 9. | bet on it | be certain of it |
| 10. | beyond doubt | certainly |
| 11. | beyond question | certainly |
| 12. | bound to | certain to happen |
| 13. | by all means | certainly; go ahead |
| 14. | categorically | in an absolute way |
| 15. | certainly | without question |
| 16. | clearly | in an obvious way |
| 17. | conclusively | in a final, certain way |
| 18. | confirmed | made certain |
| 19. | count on it | be certain of it |
| 20. | damn right | emphatically yes |
| 21. | dead certain | completely sure |
| 22. | dead sure | completely sure |
| 23. | decidedly | clearly and definitely |
| 24. | definitely | without any doubt |
| 25. | doubtless | without doubt |
| 26. | established | clearly shown or accepted |
| 27. | exactly | precisely; that’s right |
| 28. | factually | in truth |
| 29. | firmly | with conviction or certainty |
| 30. | fixed | firmly decided |
| 31. | for a fact | with certainty |
| 32. | for certain | with certainty |
| 33. | for real | truly; seriously |
| 34. | granted | admittedly; certainly |
| 35. | guaranteed | certain to happen |
| 36. | hell yes | strong enthusiastic yes |
| 37. | honestly | truly; sincerely |
| 38. | in fact | indeed; actually |
| 39. | inarguably | beyond dispute |
| 40. | incontestably | beyond dispute |
| 41. | indeed | in fact; certainly |
| 42. | indisputably | not open to argument |
| 43. | inevitably | certainly; unavoidably |
| 44. | irrefutably | unable to be denied |
| 45. | just so | exactly so |
| 46. | legit | genuinely; truly |
| 47. | legitimately | truly; properly |
| 48. | locked in | certain; settled |
| 49. | manifestly | plainly; obviously |
| 50. | most certainly | definitely |
| 51. | naturally | as expected; certainly |
| 52. | necessarily | as a necessary result |
| 53. | no doubt | certainly; probably certainly |
| 54. | no kidding | seriously; truly |
| 55. | no problem | certainly; it’s fine |
| 56. | of course | naturally; certainly |
| 57. | one hundred percent | completely certain |
| 58. | patently | obviously; clearly |
| 59. | plainly | in a clear, certain way |
| 60. | positively | definitely; unquestionably |
| 61. | precisely | exactly; certainly |
| 62. | proven | shown to be true |
| 63. | quite certainly | very certainly |
| 64. | really | truly; genuinely |
| 65. | resolved | firmly decided |
| 66. | rest assured | be confident |
| 67. | right | correct; yes |
| 68. | roger | message understood; yes |
| 69. | solidly | firmly; surely |
| 70. | sure as anything | definitely |
| 71. | sure as hell | definitely |
| 72. | sure enough | as expected; certainly |
| 73. | sure thing | definitely; yes |
| 74. | surely | certainly or definitely |
| 75. | that’s right | correct; certainly |
| 76. | that’s true | it is correct |
| 77. | to be sure | certainly |
| 78. | totally | completely; definitely |
| 79. | transparently | clearly; obviously |
| 80. | truly | in a truthful, certain way |
| 81. | uh-huh | informal yes |
| 82. | unambiguously | in a clear, certain way |
| 83. | unarguably | beyond argument |
| 84. | undoubtedly | with no doubt |
| 85. | unequivocally | with no ambiguity |
| 86. | unquestionably | beyond doubt |
| 87. | validated | confirmed as sound |
| 88. | verified | confirmed as true |
| 89. | warranted | justified or guaranteed |
| 90. | without a doubt | certainly |
| 91. | without a question | certainly |
| 92. | without doubt | certainly |
| 93. | without fail | certainly; unfailingly |
| 94. | without question | certainly |
| 95. | yeah | casual yes |
| 96. | yep | informal yes |
| 97. | yes | an affirmative response |
| 98. | you bet | definitely; absolutely |
| 99. | you betcha | definitely; absolutely |
| 100. | you said it | that’s exactly right |
