8
strengthen(verb, support, fix, reduce, destroy)
7
bolster(verb, stop, help)
6
reinforce(verb, hurt, reduce, strengthen, augment)
5
support(noun, verb, fix, block, deny)
3
aid(noun, verb, support, fix)
3
invigorate
2
encourage(verb, support, stop, fix, reject)
2
assist(verb, support, fix, check, hinder)
2
boost(noun, verb, stop, reduce, improve)
2
fortify
2
hearten
2
improve
2
toughen
1
assure
1
augment(verb, hurt, reduce, diminish)
1
backing
1
brace(release, weaken)
1
confirm
1
consolidate
1
corroborate
<1234510>
11 years ago|3.2k views|share |citing 
APASmart Define. (2015). undermine thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/undermine/thesaurus/antonyms
ChicagoSmart Define. 2015. "undermine thesaurus" https://smartdefine.org/undermine/thesaurus/antonyms (accessed September 21, 2026).
HarvardSmart Define 2015, undermine thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/undermine/thesaurus/antonyms>.
MLASmart Define. "undermine thesaurus" 10 April 2015. Web. 21 September 2026. <https://smartdefine.org/undermine/thesaurus/antonyms>