85 entries under assert topic. ×

39
warrant(noun, verb, support, cover, maintain)
19
vow(noun, verb, support, maintain, pass)
17
certify(verb, support, state, maintain, praise)
14
vouch(verb, support, state, give, maintain)
13
attest(verb, support, state, maintain, praise)
13
cinch(noun, verb, phrasal verb, state, cover)
12
affirm(verb, support, state, maintain, praise)
12
confirm(verb, support, state, maintain, praise)
12
swear(verb, state, maintain, declare, agreement)
10
endorse(verb, support, state, maintain, secure)
9
back(verb, support, help, maintain, promote)
7
testify(verb, support, state, maintain, back)
6
verify(verb, support, state, maintain, back)
4
avouch(verb, state, maintain, declare, approve)
4
avow(verb, support, state, maintain, back)
4
back up(verb, expression, phrasal verb, support, maintain)
4
clinch(verb, state, maintain, secure, settle)
4
corroborate(verb, support, state, maintain, back)
4
maintain(verb, support, state, favor, back)
4
ratify(verb, support, state, maintain, praise)
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APASmart Define. (2015). guarantee thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/guarantee/thesaurus/synonyms
ChicagoSmart Define. 2015. "guarantee thesaurus" https://smartdefine.org/guarantee/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, guarantee thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/guarantee/thesaurus/synonyms>.
MLASmart Define. "guarantee thesaurus" 24 December 2015. Web. 22 September 2026. <https://smartdefine.org/guarantee/thesaurus/synonyms>