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100 Best Synonyms for “Affirm”

July 26, 2026

100 Best Synonyms for

No. Item Definition
1. accept regard as true or valid
2. acknowledge admit or recognize as true
3. adjudge declare officially or judicially
4. admit concede as true
5. agree express the same view
6. approve officially agree to or accept
7. assert state firmly or confidently
8. assure tell confidently to remove doubt
9. attest bear witness to truth
10. avow state openly and frankly
11. back up support with evidence or words
12. be honest about state truthfully
13. bear out show to be true
14. bolster support or strengthen
15. broadcast make widely known
16. buttress support or strengthen strongly
17. buy accept as believable
18. certify officially confirm as true
19. champion strongly support or defend
20. come clean admit the truth openly
21. concede admit after resistance or doubt
22. concur agree with a statement
23. confirm state that something is true
24. contend argue that something is true
25. cop to admit, especially informally
26. corroborate support with confirming evidence
27. credit believe to be true
28. declare announce clearly and formally
29. deem regard as true or fitting
30. defend support against criticism or attack
31. demonstrate show clearly with evidence
32. echo repeat or reflect a view
33. emphasize give special importance to
34. endorse publicly support or approve
35. establish prove or set firmly
36. evidence support with proof
37. express put into words clearly
38. fess up admit truth informally
39. fortify strengthen with support or proof
40. give assurance provide confident confirmation
41. give credence to accept as believable
42. give one’s word promise truth or commitment
43. go along with agree with a view
44. go on record state publicly and officially
45. grant admit as true or valid
46. green-light give approval to proceed
47. guarantee promise truth or certainty
48. highlight draw attention to
49. hold believe and state as true
50. insist state firmly despite opposition
51. lend support to provide support for
52. let on reveal or admit
53. line up behind show support for publicly
54. maintain continue to state as true
55. make clear express so it is understood
56. make known reveal or announce
57. mention refer to briefly
58. note mention or observe briefly
59. observe state as a comment
60. okay approve or authorize
61. own admit or acknowledge truth
62. point out mention clearly and directly
63. proclaim announce publicly and emphatically
64. profess declare openly or publicly
65. pronounce declare officially or formally
66. prove show to be true
67. publish make publicly known
68. put forward state for consideration
69. put on record state officially for record
70. quote repeat exact words as support
71. ratify give formal approval to
72. reaffirm state again with conviction
73. reassert state again forcefully
74. reassure restore confidence by confirming
75. regard as true consider to be true
76. remark say or comment briefly
77. report give an account of
78. represent state or describe as
79. say so state that it is so
80. set forth present clearly and formally
81. stand behind support fully and publicly
82. stand by continue to support or defend
83. stand over support and defend a claim
84. state express clearly in words
85. submit present for acceptance or belief
86. subscribe to agree with or support
87. substantiate provide support for truth
88. swear declare solemnly as true
89. take as true accept as true
90. tell the truth speak honestly and accurately
91. testify give evidence or declare truth
92. underline emphasize a point
93. underscore emphasize or highlight
94. uphold support as valid or true
95. validate confirm as sound or acceptable
96. verify check and establish truth
97. voice express openly in words
98. vouch for guarantee the truth of
99. warrant guarantee or justify as true
100. witness attest from personal knowledge
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