6
seal(verb, settle, certain, decide, verify)
6
see to it(verb, expression, idiom, phrasal verb)
6
state(verb, confirm, authorize, affirm, verify)
5
cheer(encourage, comfort, hope, inspire, uplift)
5
corroborate(verb, support, state, maintain, back)
5
embolden(noun, verb, encourage, hope, inspire)
5
endorse(verb, support, state, maintain, secure)
5
fix(verb, strengthen, fortify, reinforce)
5
sell(verb, get, meet, encourage, do)
5
support(verb, cover, keep, maintain, encourage)
5
testify(verb, support, state, maintain, secure)
5
underwrite(verb, cover, agree, declare, approve)
5
verify(verb, support, state, maintain, settle)
5
win over(verb, expression, phrasal verb, get, meet)
4
agree(verb, commit, undertake, promise, guarantee)
4
bond(noun, verb, guarantee)
4
cinch(verb, phrasal verb, cover, secure, establish)
4
control
4
countersign(verb, security, guarantee)
4
decide(verb, settle, certainty, seal)
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APASmart Define. (2015). assure thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/assure/thesaurus/synonyms
ChicagoSmart Define. 2015. "assure thesaurus" https://smartdefine.org/assure/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, assure thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/assure/thesaurus/synonyms>.
MLASmart Define. "assure thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/assure/thesaurus/synonyms>