12
swear(verb, law, support, state, hold)
11
validate(verb, support, state, show, maintain)
10
endorse(verb, support, state, maintain, secure)
10
acknowledge(verb, state, maintain, declare, tell)
10
guarantee(noun, verb, support, state, maintain)
10
seal(verb, show, settle, sign, confirm)
10
support(verb, show, maintain, secure, favor)
10
vouch(verb, support, state, maintain, back)
9
assure(verb, support, state, maintain, secure)
9
evince(verb, support, state, make, mean)
9
exhibit(verb, state, show, present, maintain)
9
give evidence(verb, expression, idiom, state, show)
9
state(verb, hold, press, maintain, declare)
8
announce(verb, state, make, mean, show)
8
argue(verb, state, hold, make, give)
8
avouch(verb, state, press, maintain, oppose)
8
bear out(verb, expression, phrasal verb, support, show)
8
indicate(verb, state, give, show, present)
8
sign(noun, verb, support, make, show)
7
allege(verb, state, hold, press, maintain)
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APASmart Define. (2015). attest thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/attest/thesaurus/synonyms
ChicagoSmart Define. 2015. "attest thesaurus" https://smartdefine.org/attest/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, attest thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/attest/thesaurus/synonyms>.
MLASmart Define. "attest thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/attest/thesaurus/synonyms>