3
swear to(verb, expression, support, maintain, back)
3
tie(pass, catch, commit, undertake, security)
3
validate(verb, state, settle, approve, confirm)
3
witness(verb, support, state, maintain, praise)
2
protection(noun, cover, sanctuary, safety, refuge)
2
accept(verb, start, assume, attempt, security)
2
accredit(verb, support, state, control, praise)
2
armor(bond, freedom, sanctuary, safety, refuge)
2
arrangement(noun, agreement, deal, promise)
2
ascertain(verb, state, confirm, verify)
2
assert(verb, support, state, maintain, favor)
2
assert under oath(expression, idiom, support)
2
asseverate(verb, support, state, maintain, back)
2
attempt(verb, accept, start, try, assume)
2
attest to(verb, expression, support, maintain, back)
2
attestation(noun, agreement, permit, record, assurance)
2
bankroll(verb, support, help, promote, secure)
2
batten
2
bear witness(verb, expression, idiom, promise)
2
bind oneself(verb, expression, support, incite, promise)
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APASmart Define. (2015). guarantee thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/guarantee/thesaurus/synonyms
ChicagoSmart Define. 2015. "guarantee thesaurus" https://smartdefine.org/guarantee/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, guarantee thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/guarantee/thesaurus/synonyms>.
MLASmart Define. "guarantee thesaurus" 24 December 2015. Web. 23 September 2026. <https://smartdefine.org/guarantee/thesaurus/synonyms>