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100 Best Synonyms for “Bolster”

June 22, 2026

100 Best Synonyms for

No. Item Definition
1. activate make active or effective
2. add to increase or strengthen
3. advance help move forward
4. advocate publicly support or recommend
5. aid help or support
6. amplify increase strength or effect
7. arm equip for strength or defense
8. assist help or support
9. augment make greater by adding
10. back give support or approval to
11. bankroll provide financial support
12. beef up make stronger or larger
13. bind tie together for strength
14. boost increase or improve
15. brace make firmer or stronger
16. build up increase gradually or strengthen
17. bulk up make larger or stronger
18. buttress provide support or reinforcement
19. cement make stronger or more secure
20. champion actively support a cause
21. cheer encourage or comfort
22. confirm support with evidence
23. consolidate make stronger by uniting
24. contribute to help cause or strengthen
25. corroborate support with confirming evidence
26. cultivate develop or encourage growth
27. deepen make stronger or more intense
28. defend protect or support against attack
29. develop grow or strengthen over time
30. elevate raise to a higher level
31. encourage give confidence or support
32. endorse publicly support or approve
33. endow provide with a quality
34. enhance increase quality or effectiveness
35. enrich improve quality or value
36. equip provide what is needed
37. espouse adopt and support an idea
38. expand increase in size or scope
39. extend make broader or greater
40. feed supply and strengthen
41. finance provide money for support
42. firm up make stronger or more certain
43. fortify make stronger against weakness
44. foster encourage growth or development
45. fuel provide energy or support
46. fund provide money to support
47. harden make firmer or stronger
48. hearten give encouragement or confidence
49. help make easier or support
50. hold up support or keep from collapsing
51. improve make better or stronger
52. increase make larger or stronger
53. integrate combine into a stronger whole
54. intensify make stronger or more extreme
55. invest put resources into strengthening
56. invigorate give energy or strength
57. keep afloat prevent failure or collapse
58. keep up maintain at a level
59. magnify make greater or stronger
60. maintain keep at the same level
61. marshal gather for support or action
62. mobilize organize for action or support
63. nurture help develop and strengthen
64. preserve keep from weakening or loss
65. promote help advance or improve
66. prop up support from falling or failing
67. protect keep safe from harm
68. rally bring support together
69. ramp up increase or intensify
70. rebuild build again stronger
71. reinforce add strength or support to
72. reinvigorate make strong and active again
73. renew make strong or fresh again
74. repair fix and strengthen again
75. restore bring back strength or health
76. revitalize give new strength or energy
77. revive bring back strength or activity
78. shore up support something weak or failing
79. stabilize make more stable or secure
80. steady make stable or secure
81. step up increase effort or level
82. stiffen make firmer or stronger
83. stimulate encourage activity or growth
84. strengthen make stronger or more effective
85. supply provide what is needed
86. support give strength or help to
87. sustain keep going or maintain
88. temper strengthen by controlled treatment
89. tighten make more secure or firm
90. toughen make stronger or harder
91. undergird give basic support to
92. underpin support from beneath or basic level
93. underwrite financially support or guarantee
94. unify bring together for strength
95. upgrade improve to a better level
96. uphold support or maintain
97. validate support as sound or true
98. vivify give life or energy
99. vouch for support as trustworthy
100. weld join firmly for strength
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