12
guarantee(verb, support, help, promote, praise)
11
attest(verb, support, show, maintain, praise)
10
certify(verb, support, show, maintain, praise)
7
promise(verb, support, maintain, secure, approve)
6
assure(verb, support, maintain, secure, approve)
6
endorse(verb, support, maintain, praise, secure)
6
support(verb, show, maintain, secure, favor)
6
verify(verb, show, confirm, prove, appear)
5
authenticate(verb, support, show, praise, favor)
5
aver(verb, support, show, maintain, secure)
5
confirm(verb, support, show, maintain, praise)
5
pledge(verb, support, maintain, secure, approve)
4
affirm(verb, support, show, maintain, praise)
4
recommend(verb, support, praise, favor, back)
4
substantiate(verb, show, confirm, prove, appear)
4
swear(verb, support, show, maintain, secure)
4
warrant(verb, support, show, maintain, praise)
3
accredit(verb, support, control, praise, favor)
3
back(verb, support, help, maintain, promote)
3
bear out(verb, expression, state, show, sign)
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APASmart Define. (2015). vouch for thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/vouch_for/thesaurus/synonyms
ChicagoSmart Define. 2015. "vouch for thesaurus" https://smartdefine.org/vouch_for/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, vouch for thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/vouch_for/thesaurus/synonyms>.
MLASmart Define. "vouch for thesaurus" 13 April 2015. Web. 21 September 2026. <https://smartdefine.org/vouch_for/thesaurus/synonyms>