12 entries under ascertains topic. ×

8
confirms(verb, evinces, authorizes, approves, proves)
6
assures(verb, affirms, guarantees)
5
proves(verb, evinces, proves)
5
verifies(verb, affirms, proves)
4
demonstrates(verb, evinces, proves)
4
establishes(verb, evinces, proves)
3
determines(verb, evinces, proves)
3
substantiates(verb, evinces)
2
ascertains(verb, proves)
1
audits
1
checks
1
double-checks
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APASmart Define. (2015). certifies thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/certifies/thesaurus/synonyms
ChicagoSmart Define. 2015. "certifies thesaurus" https://smartdefine.org/certifies/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, certifies thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/certifies/thesaurus/synonyms>.
MLASmart Define. "certifies thesaurus" 14 April 2015. Web. 24 September 2026. <https://smartdefine.org/certifies/thesaurus/synonyms>