38
confirm(verb, support, state, show, accept)
27
validate(verb, support, state, show, accept)
25
affirm(verb, support, state, show, accept)
25
corroborate(verb, support, state, show, maintain)
24
verify(verb, support, state, check, show)
23
authenticate(verb, support, state, show, determine)
21
attest(verb, support, state, show, maintain)
20
endorse(verb, support, state, make, accept)
20
assure(verb, support, state, maintain, secure)
19
warrant(verb, support, state, make, show)
18
license(noun, verb, support, state, make)
18
ratify(verb, support, state, show, accept)
18
substantiate(verb, support, show, maintain, determine)
18
guarantee(noun, verb, support, state, maintain)
18
prove(verb, support, state, show, maintain)
18
witness(verb, support, state, show, maintain)
17
approve(verb, support, state, make, accept)
17
demonstrate(verb, state, check, show, maintain)
17
sanction(verb, support, state, make, meet)
17
testify(verb, support, state, show, maintain)
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APASmart Define. (2016). certify thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/certify/thesaurus/synonyms
ChicagoSmart Define. 2016. "certify thesaurus" https://smartdefine.org/certify/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2016, certify thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/certify/thesaurus/synonyms>.
MLASmart Define. "certify thesaurus" 11 January 2016. Web. 20 September 2026. <https://smartdefine.org/certify/thesaurus/synonyms>