6
safeguard(noun, verb, cover, care, confirm)
6
seal(noun, verb, secure, settle, back)
6
stipulation(noun, agreement, arrangement, deal, promise)
6
verify(verb, support, state, maintain, back)
6
warrantee(noun, security)
6
word of honor(noun, expression, idiom, support, agreement)
5
absolutely
5
assuredly
5
authenticate(verb, support, state, praise, settle)
5
bargain(noun, verb, order, accept, start)
5
certification(noun, agreement, permit, record, assurance)
5
defend(verb, support, show, praise, favor)
5
definitely
5
for sure
5
gage(noun, agreement, counter, assurance, promise)
5
indemnity(noun, cover, protection, security, surety)
5
reassure(verb, state, encourage, restore, confirm)
5
stand behind(verb, expression, phrasal verb, support, praise)
4
affirmation(noun, support, agreement, permit, record)
4
angel(verb, support, secure, back, approve)
10 years ago|28k views|share |citing 
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>