130 entries under substantiate topic. ×

6
ascertain(verb, state, make, show, determine)
6
bless(verb, support, accept, praise, favor)
6
check out(verb, expression, phrasal verb, fix, determine)
6
claim(verb, support, state, maintain, favor)
6
countenance(verb, support, accept, maintain, promote)
6
document(verb, show, determine, explain, find)
6
double-check(verb, fix, check, determine, discover)
6
encourage(verb, support, help, accept, maintain)
6
maintain(verb, support, state, help, accept)
6
make good(verb, expression, idiom, support, favor)
6
manifest(verb, state, show, maintain, determine)
6
okay(verb, support, state, clear, accept)
5
vouch for(verb, expression, phrasal verb, support, show)
5
second(verb, support, accept, maintain, promote)
5
subscribe(verb, sign, indicate, endorse, prove)
5
test(verb, check, show, determine, correct)
5
try(verb, check, show, determine, correct)
4
defend(verb, support, help, keep, maintain)
4
explain(verb, support, prove, illustrate)
4
legalize(verb, support, favor, endorse)
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APASmart Define. (2015). confirm thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/confirm/thesaurus/synonyms
ChicagoSmart Define. 2015. "confirm thesaurus" https://smartdefine.org/confirm/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, confirm thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/confirm/thesaurus/synonyms>.
MLASmart Define. "confirm thesaurus" 10 April 2015. Web. 27 September 2026. <https://smartdefine.org/confirm/thesaurus/synonyms>