2
plight(verb, declare, assert, engage, contract)
2
profession
2
pronounce(verb, state, maintain, declare, tell)
2
proposition
2
ratify(verb, support, state, maintain, back)
2
reassure(state, confirm, verify, certify)
2
repeat(verb, state, maintain, declare, tell)
2
rubber-stamp(verb, support, state, give, maintain)
2
safeguard(verb, guarantee)
2
say so(verb, expression, state, give, maintain)
2
set(verb, state, maintain, declare, confirm)
2
statement
2
stipulate(verb, declare, commit, undertake, affirm)
2
subscribe(verb, support, back, declare, sign)
2
swear on bible(expression, idiom, state, maintain, agree)
2
swear up and down(verb, expression, idiom, state, give)
2
troth(pass, catch, commit, undertake)
2
underpin(verb, support, back, sign, uphold)
2
underwrite(verb, declare, commit, undertake, affirm)
2
vouchsafe(verb, promise, swear, vow)
11 years ago|7.1k views|share |citing 
APASmart Define. (2015). vouch thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/vouch/thesaurus/synonyms
ChicagoSmart Define. 2015. "vouch thesaurus" https://smartdefine.org/vouch/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, vouch thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/vouch/thesaurus/synonyms>.
MLASmart Define. "vouch thesaurus" 13 April 2015. Web. 23 September 2026. <https://smartdefine.org/vouch/thesaurus/synonyms>