2
suffer
2
symbolize(verb, character, express, realize, appear)
2
tolerate
2
try on(verb, expression, phrasal verb, check, examine)
2
typify(verb, character, express, realize, appear)
2
underpin(verb, support, back, sign, explain)
2
vouchsafe
2
vow(verb, support, maintain, back, declare)
1
John Hancock(expression, endorse, prove, verify, corroborate)
1
abet(verb, hold, help, maintain, establish)
1
abide
1
absolve(verb, support, maintain, favor, sustain)
1
acknowledge
1
acquit(verb, support, maintain, favor, sustain)
1
act as a witness(verb, expression, idiom, support, maintain)
1
act out(expression, character, express, manifest, illustrate)
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
advance(verb, hold, help, establish, back)
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APASmart Define. (2015). substantiate thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/substantiate/thesaurus/synonyms
ChicagoSmart Define. 2015. "substantiate thesaurus" https://smartdefine.org/substantiate/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, substantiate thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/substantiate/thesaurus/synonyms>.
MLASmart Define. "substantiate thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/substantiate/thesaurus/synonyms>