3
ensure(verb, verify)
3
exhibit(verb, show, complete, establish, express)
3
experiment(verb, check, show, determine, examine)
3
explain(verb, support, show, determine, favor)
3
hold(verb, help, establish, back, approve)
3
illustrate(verb, show, complete, character, establish)
3
incorporate(verb, complete, express, realize, represent)
3
keep
3
subscribe(verb, support, back, sign, explain)
2
asseverate(verb, support, maintain, back, declare)
2
avouch(verb, evince)
2
bear witness(verb, expression, show, confirm, prove)
2
betoken(verb, state, show, prove, appear)
2
body
2
challenge
2
complete(verb, express, idea, realize, prove)
2
connote(verb, show, prove, demonstrate, evince)
2
contend(verb, support, maintain, favor, back)
2
corporealize(realize, appear, happen, arrive, unfold)
2
debunk(verb, support, back, sign, idea)
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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>