| No. | Item | Definition |
|---|---|---|
| 1. | affirm | state that something is true |
| 2. | approve | officially accept or agree to |
| 3. | ascertain | find out with certainty |
| 4. | assert | state confidently as true |
| 5. | assure | tell confidently to remove doubt |
| 6. | attest | declare or prove truth |
| 7. | authenticate | prove something is genuine |
| 8. | authorize | give official permission for |
| 9. | aver | state confidently as fact |
| 10. | avow | state openly and firmly |
| 11. | back | support or endorse |
| 12. | bear out | support or prove true |
| 13. | bless | approve informally or ceremonially |
| 14. | buttress | support with evidence or argument |
| 15. | certify | officially state as true |
| 16. | check | examine for accuracy |
| 17. | commission | authorize officially |
| 18. | concede | admit something is true |
| 19. | confess | admit openly or reluctantly |
| 20. | consent to | agree to permit |
| 21. | corroborate | support with additional evidence |
| 22. | cross-check | verify using another source |
| 23. | decide | settle after consideration |
| 24. | declare | state formally or clearly |
| 25. | deem valid | consider valid officially |
| 26. | demonstrate | show clearly by evidence |
| 27. | determine | find out or establish |
| 28. | document | support with written evidence |
| 29. | double-check | check again for certainty |
| 30. | endorse | publicly support or approve |
| 31. | ensure | make certain or secure |
| 32. | establish | prove or make certain |
| 33. | evidence | show by evidence |
| 34. | evince | show clearly; reveal |
| 35. | examine | inspect carefully |
| 36. | execute | sign to make valid |
| 37. | fact-check | verify factual accuracy |
| 38. | finalize | make final or definite |
| 39. | find valid | judge to be valid |
| 40. | fix | settle definitely |
| 41. | formalize | make official or definite |
| 42. | give approval | approve formally or informally |
| 43. | give blessing | approve or support |
| 44. | give consent | approve by agreeing |
| 45. | give the nod | approve informally |
| 46. | go along with | agree to or accept |
| 47. | grant | admit or agree as true |
| 48. | green-light | give permission or approval |
| 49. | guarantee | promise or assure certainty |
| 50. | indicate | show or suggest as true |
| 51. | initial | mark with initials to approve |
| 52. | inspect | examine carefully to verify |
| 53. | justify | show to be right |
| 54. | legitimize | make lawful or accepted |
| 55. | license | officially permit or authorize |
| 56. | lock in | make definite or fixed |
| 57. | make certain | ensure or verify |
| 58. | make official | approve or formalize |
| 59. | make sure | ensure or verify |
| 60. | make valid | give legal or official force |
| 61. | manifest | show plainly or clearly |
| 62. | nod through | approve quickly or routinely |
| 63. | notarize | certify officially by notary |
| 64. | OK | approve or accept informally |
| 65. | okay | approve or accept informally |
| 66. | own | admit or acknowledge |
| 67. | permit | allow or authorize |
| 68. | pledge | promise or guarantee |
| 69. | profess | declare openly or formally |
| 70. | prove | show something is true |
| 71. | ratify | formally approve or authorize |
| 72. | reaffirm | state again as true |
| 73. | reapprove | approve again or anew |
| 74. | reassert | state firmly again |
| 75. | recognize | accept as valid or official |
| 76. | reinforce | strengthen or support further |
| 77. | resolve | settle or decide conclusively |
| 78. | revalidate | validate again or anew |
| 79. | reverify | verify again or anew |
| 80. | rubber-stamp | approve without real scrutiny |
| 81. | sanction | officially approve or permit |
| 82. | seal | make final or official |
| 83. | settle | resolve or make certain |
| 84. | show | make clear or evident |
| 85. | sign off | give final approval |
| 86. | state | express clearly in words |
| 87. | subscribe to | agree with or support |
| 88. | substantiate | support with proof or evidence |
| 89. | support | provide evidence for |
| 90. | sustain | support or uphold |
| 91. | test | check by trial or examination |
| 92. | testify | give evidence under oath |
| 93. | uphold | support or maintain as valid |
| 94. | validate | show something is valid |
| 95. | verify | check that something is true |
| 96. | vet | check carefully before approving |
| 97. | vindicate | prove right or justified |
| 98. | vouch | attest from personal knowledge |
| 99. | warrant | guarantee as true or reliable |
| 100. | witness | attest to observing |