Synonyms|673Antonyms|118|Broader|13Narrower|17Related|401

173 entries under support topic. ×

9
warrant(verb, show, maintain, determine)
8
testify(verb, show, maintain, back)
7
make good(verb, expression, idiom, favor)
6
assert(verb, show, maintain, favor)
6
back up(verb, expression, phrasal verb, help)
6
buttress(verb, increase, present, establish)
6
check(verb, show, determine, back)
6
evidence(noun, verb, show, determine)
5
approve(verb, hold, help, maintain)
5
bolster(verb, hold, help, increase)
5
declare(verb, show, maintain, determine)
5
fortify(verb, increase, establish, extend)
5
guarantee(verb, maintain, back, declare)
5
vindicate(verb, maintain, defend, explain)
5
witness(verb, show, maintain, determine)
4
avow(verb, maintain, back, declare)
4
clear(verb, maintain, favor, sustain)
4
defend(verb, hold, help, maintain)
4
maintain(verb, hold, help, favor)
4
reinforce(verb, increase, establish, extend)
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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>