| No. | Item | Definition |
|---|---|---|
| 1. | advise | inform or notify |
| 2. | affirm | state positively or firmly |
| 3. | allay | reduce fear or worry |
| 4. | answer for | take responsibility for |
| 5. | appease | bring peace to feelings |
| 6. | assert | state with confidence |
| 7. | attest | declare to be true |
| 8. | authenticate | verify as genuine |
| 9. | avow | state openly and firmly |
| 10. | back up | support with evidence |
| 11. | bear out | confirm by evidence |
| 12. | bind oneself | commit oneself firmly |
| 13. | bolster | support or strengthen |
| 14. | buttress | support or strengthen |
| 15. | calm | make less anxious |
| 16. | certify | attest officially as true |
| 17. | claim | state as true |
| 18. | clear up | remove doubt or confusion |
| 19. | comfort | give relief from worry |
| 20. | confirm | state as true |
| 21. | console | give emotional reassurance |
| 22. | contend | assert in argument |
| 23. | convince | persuade as true |
| 24. | corroborate | confirm with supporting evidence |
| 25. | declare | announce firmly or formally |
| 26. | demonstrate | show clearly with proof |
| 27. | dispel fears | remove worries or doubts |
| 28. | double-check | verify carefully again |
| 29. | ease concerns | reduce worries |
| 30. | encourage | give confidence or hope |
| 31. | endorse | approve or support publicly |
| 32. | ensure | make certain of something |
| 33. | establish | show clearly as true |
| 34. | evidence | provide proof of |
| 35. | give a guarantee | offer a formal promise |
| 36. | give assurance | offer confidence or certainty |
| 37. | give comfort | provide emotional reassurance |
| 38. | give confidence | make someone feel sure |
| 39. | give one’s word | make a firm promise |
| 40. | guarantee | promise with certainty |
| 41. | hearten | make more confident |
| 42. | indicate | point to as true |
| 43. | inform | give knowledge or facts |
| 44. | insist | state firmly despite doubt |
| 45. | insure | protect or guarantee against |
| 46. | lay fears to rest | end worries or doubts |
| 47. | leave no doubt | make completely clear |
| 48. | lock in | make certain or fixed |
| 49. | maintain | insist remains true |
| 50. | make certain | remove uncertainty |
| 51. | make clear | clarify beyond doubt |
| 52. | make plain | make clear and certain |
| 53. | make sure | ensure something happens |
| 54. | mollify | soothe anger or worry |
| 55. | nail down | make definite or certain |
| 56. | notify | inform formally |
| 57. | offer assurance | provide confidence or certainty |
| 58. | persuade | cause to believe |
| 59. | pin down | determine exactly or confirm |
| 60. | pledge | make a serious promise |
| 61. | profess | declare openly or sincerely |
| 62. | promise | give your word |
| 63. | protest | declare emphatically |
| 64. | prove | demonstrate truth or certainty |
| 65. | put at ease | make someone relaxed |
| 66. | put beyond doubt | make completely certain |
| 67. | put minds at rest | make people stop worrying |
| 68. | quiet fears | reduce anxiety or worry |
| 69. | ratify | confirm formally or officially |
| 70. | reassure | ease someone’s worries |
| 71. | reconfirm | confirm again |
| 72. | reinforce | strengthen or support further |
| 73. | reiterate | say again for emphasis |
| 74. | relieve | ease anxiety or concern |
| 75. | remove doubt | make certain |
| 76. | report | state as information |
| 77. | represent | state or describe as |
| 78. | resolve doubts | remove uncertainty |
| 79. | satisfy | remove doubts or concerns |
| 80. | secure | make safe or certain |
| 81. | set at ease | make someone less worried |
| 82. | set minds at rest | remove people’s worries |
| 83. | settle | calm or reassure |
| 84. | soothe | calm or comfort |
| 85. | steady | make calmer and surer |
| 86. | still fears | make fears quieter |
| 87. | substantiate | support with proof |
| 88. | swear | declare with solemn certainty |
| 89. | testify | give evidence or affirmation |
| 90. | tranquilize | make calm or less anxious |
| 91. | undertake | promise to do |
| 92. | underwrite | guarantee financial backing |
| 93. | uphold | support as valid |
| 94. | validate | confirm as acceptable or true |
| 95. | verify | check and confirm truth |
| 96. | vouch | speak for confidently |
| 97. | vow | promise solemnly |
| 98. | warrant | guarantee or justify |
| 99. | win over | gain someone’s confidence |
| 100. | witness | serve as proof of |
