1
John Hancock(expression, endorse, prove, verify, substantiate)
1
act as a witness(verb, expression, idiom, support, maintain)
1
actualize(verb, idea, confirm, prove, affirm)
1
add(verb, support, increase, establish, extend)
1
add fuel to fire(verb, expression, idiom, support, increase)
1
add up(verb, expression, show, determine, confirm)
1
affirmation
1
allege
1
anneal(verb, support, increase, establish, extend)
1
announce(verb, state, show, declare, sign)
1
argue(verb, state, show, maintain, declare)
1
ascend(verb, support, increase, establish, extend)
1
ascertain(verb, state, show, determine, confirm)
1
asseverate(verb, support, maintain, back, declare)
1
authorize(verb, state, make, base, approve)
1
avert(verb, support, maintain, back, declare)
1
be behind(verb, expression, phrasal verb, approve, sanction)
1
be responsible for(verb, support, maintain, back, declare)
1
bear testimony(verb, expression, idiom, support, maintain)
1
bespeak(verb, state, show, declare, sign)
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APASmart Define. (2015). corroborate thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/corroborate/thesaurus/synonyms
ChicagoSmart Define. 2015. "corroborate thesaurus" https://smartdefine.org/corroborate/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, corroborate thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/corroborate/thesaurus/synonyms>.
MLASmart Define. "corroborate thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/corroborate/thesaurus/synonyms>