| No. | Item | Definition |
|---|---|---|
| 1. | a sure thing | a certainty |
| 2. | absolutely | with complete certainty |
| 3. | actually | in reality |
| 4. | altogether | completely; entirely |
| 5. | as a fact | as something true |
| 6. | assuredly | with assurance |
| 7. | beyond all doubt | with no doubt whatsoever |
| 8. | beyond any doubt | with no possible doubt |
| 9. | beyond argument | not arguable |
| 10. | beyond controversy | not controversial |
| 11. | beyond debate | not debatable |
| 12. | beyond dispute | not disputable |
| 13. | beyond doubt | completely certain |
| 14. | beyond question | not questionable |
| 15. | categorically | in absolute terms |
| 16. | certainly | without doubt |
| 17. | clearly | in an obvious way |
| 18. | completely | totally; absolutely |
| 19. | conclusively | settling all doubt |
| 20. | confidently | with confidence |
| 21. | convincingly | in a persuasive way |
| 22. | decidedly | clearly and certainly |
| 23. | decisively | with clear finality |
| 24. | definitively | in a conclusive way |
| 25. | doubtless | without doubt |
| 26. | emphatically | with strong emphasis |
| 27. | entirely | completely; absolutely |
| 28. | evidently | as evidence shows |
| 29. | explicitly | clearly and directly |
| 30. | expressly | clearly and specifically |
| 31. | firmly | with firm conviction |
| 32. | for a certainty | as a sure thing |
| 33. | for a fact | known to be true |
| 34. | for certain | with certainty |
| 35. | for real | truly; seriously |
| 36. | for sure | certainly; without doubt |
| 37. | fully | completely; entirely |
| 38. | genuinely | really and truly |
| 39. | gladly | willingly; certainly |
| 40. | guaranteed | certain to happen |
| 41. | honestly | truthfully; really |
| 42. | in actuality | in actual fact |
| 43. | in fact | actually; certainly |
| 44. | in reality | actually true |
| 45. | in truth | really; certainly |
| 46. | incontestably | impossible to contest |
| 47. | incontrovertibly | impossible to contradict |
| 48. | indeed | used to confirm strongly |
| 49. | indisputably | impossible to dispute |
| 50. | irrefutably | impossible to refute |
| 51. | literally | actually; truly |
| 52. | manifestly | clearly apparent |
| 53. | most assuredly | very assuredly |
| 54. | most certainly | very certainly |
| 55. | naturally | as expected |
| 56. | necessarily | as a necessary result |
| 57. | no doubt | certainly |
| 58. | no question | certainly; no doubt |
| 59. | obviously | as is clear |
| 60. | of course | naturally; certainly |
| 61. | patently | plainly obvious |
| 62. | perfectly | completely; absolutely |
| 63. | plainly | in an obvious way |
| 64. | positively | with firm certainty |
| 65. | predictably | as one would expect |
| 66. | quite | completely; certainly |
| 67. | readily | willingly; without hesitation |
| 68. | really | actually; certainly |
| 69. | resoundingly | strongly and clearly |
| 70. | rest assured | be certain |
| 71. | right enough | indeed; certainly |
| 72. | securely | with assurance |
| 73. | seriously | truly; in earnest |
| 74. | sure | certainly; informally |
| 75. | surely | with confidence |
| 76. | thoroughly | completely; certainly |
| 77. | to a certainty | with complete certainty |
| 78. | to be sure | certainly; admittedly |
| 79. | totally | completely; absolutely |
| 80. | truly | really; genuinely |
| 81. | truthfully | in truth |
| 82. | unarguably | not reasonably arguable |
| 83. | undeniably | impossible to deny |
| 84. | undoubtedly | beyond doubt |
| 85. | unequivocally | with no ambiguity |
| 86. | unmistakably | clearly identifiable |
| 87. | unquestionably | not open to question |
| 88. | utterly | completely; absolutely |
| 89. | verily | truly; certainly |
| 90. | without a doubt | certainly |
| 91. | without a question | certainly |
| 92. | without any doubt | with no doubt |
| 93. | without doubt | with no uncertainty |
| 94. | without hesitation | readily and certainly |
| 95. | without question | with no question |
| 96. | without reservation | with no hesitation |
| 97. | without the least doubt | with no doubt at all |
| 98. | yes | an affirmative answer |
| 99. | you bet | certainly; gladly |
| 100. | you betcha | certainly; very informal |