6
materialise
6
objectify(verb, show, character, establish, declare)
6
try(verb, check, show, determine, examine)
5
approve(verb, support, hold, help, maintain)
5
body forth(verb, expression, phrasal verb, character, represent)
5
bolster(verb, support, hold, help, increase)
5
declare(verb, support, show, maintain, determine)
5
evince(verb, show, determine, establish, express)
5
fortify(verb, support, increase, establish, extend)
5
guarantee(verb, support, maintain, back, declare)
5
personalize(verb, show, establish, declare, express)
5
realise(verb, materialize)
5
swear(verb, show, confirm, prove, appear)
5
test(verb, check, show, determine, examine)
5
vindicate(verb, support, maintain, defend, explain)
5
witness(verb, support, show, maintain, determine)
4
actualise(verb, materialize)
4
adduce(verb, evince)
4
aver(verb, show, confirm, prove, appear)
4
avow(verb, support, maintain, back, declare)
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APASmart Define. (2015). substantiate thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/substantiate/thesaurus/synonyms
ChicagoSmart Define. 2015. "substantiate thesaurus" https://smartdefine.org/substantiate/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, substantiate thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/substantiate/thesaurus/synonyms>.
MLASmart Define. "substantiate thesaurus" 10 April 2015. Web. 20 September 2026. <https://smartdefine.org/substantiate/thesaurus/synonyms>