70 entries under undertake topic. ×

16
attest(verb, support, state, maintain, back)
15
guarantee(noun, verb, support, state, give)
14
swear(verb, state, maintain, declare, tell)
13
assure(verb, support, state, give, back)
12
testify(verb, state, give, maintain, declare)
11
confirm(verb, state, give, maintain, agree)
10
affirm(verb, support, state, give, maintain)
10
declare(verb, state, give, maintain, agree)
10
warrant(verb, support, give, back, declare)
9
state(verb, maintain, agree, allow, declare)
9
vow(verb, support, give, pass, declare)
8
aver(verb, state, maintain, agree, allow)
7
assert(verb, state, give, maintain, agree)
7
avow(verb, state, give, maintain, agree)
7
depose(verb, agree, allow, acknowledge, admit)
7
promise(verb, give, declare, assert, engage)
6
ensure(verb, declare, commit, affirm)
6
pledge(verb, pass, catch, declare, commit)
5
maintain(verb, state, give, agree, allow)
5
profess(verb, state, give, maintain, agree)
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APASmart Define. (2015). vouch thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/vouch/thesaurus/synonyms
ChicagoSmart Define. 2015. "vouch thesaurus" https://smartdefine.org/vouch/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, vouch thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/vouch/thesaurus/synonyms>.
MLASmart Define. "vouch thesaurus" 13 April 2015. Web. 24 September 2026. <https://smartdefine.org/vouch/thesaurus/synonyms>