8
confirms(verb, evinces, authorizes, approves, proves)
7
affirms(verb, affirms, guarantees, authorizes, approves)
7
attests(verb, affirms, evinces)
6
assures(verb, affirms, guarantees, ascertains)
6
authenticates(verb, evinces, authorizes, approves)
5
proves(verb, evinces, proves, ascertains)
5
testifies(verb, affirms, evinces)
5
validates(verb, affirms, evinces, authorizes, approves)
5
verifies(verb, affirms, proves, ascertains)
5
vouches(noun, verb, evinces, guarantees)
5
warrants(noun, verb, affirms, guarantees, authorizes)
4
approves(verb, affirms, authorizes, approves)
4
authorizes(verb, authorizes, approves)
4
demonstrates(verb, evinces, proves, ascertains)
4
establishes(verb, evinces, proves, ascertains)
3
avouches(verb, affirms, evinces)
3
corroborates(verb, affirms, evinces)
3
declares(verb, affirms, evinces)
3
determines(verb, evinces, proves, ascertains)
3
endorses(verb, affirms, approves)
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APASmart Define. (2015). certifies thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/certifies/thesaurus/synonyms
ChicagoSmart Define. 2015. "certifies thesaurus" https://smartdefine.org/certifies/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, certifies thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/certifies/thesaurus/synonyms>.
MLASmart Define. "certifies thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/certifies/thesaurus/synonyms>