5
profess(verb, support, maintain, back, declare)
4
avouch(verb, approve, uphold, explain, require)
4
certify(verb, support, maintain, back, declare)
4
consent(noun, verb, agree, declare, agreement)
4
dedicate(verb, give, offer, undertake, promise)
4
give one's word(verb, expression, idiom, promise)
4
kiss the book(expression, idiom, affirmation)
4
maintain(verb, support, hold, back, declare)
4
obligation(noun, agreement, contract, assurance, compact)
4
profession(noun, support, agreement, claim, contract)
4
swearing
4
vouchsafe(verb, promise, swear)
3
adjuration(promise, pledge, word)
3
attest(verb, approve, confirm, uphold, assert)
3
betroth(verb, pass, agree, declare, commit)
3
book
3
claim(noun, verb, maintain, approve, uphold)
3
compact(noun, verb, agree, declare, agreement)
3
confess
3
confirm(verb, support, maintain, back, declare)
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APASmart Define. (2015). vow thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/vow/thesaurus/synonyms
ChicagoSmart Define. 2015. "vow thesaurus" https://smartdefine.org/vow/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, vow thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/vow/thesaurus/synonyms>.
MLASmart Define. "vow thesaurus" 13 April 2015. Web. 24 September 2026. <https://smartdefine.org/vow/thesaurus/synonyms>