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

150 entries under confirm topic. ×

2
legitimize(verb, support, favor, sustain)
2
okay(verb, support, maintain, back, declare)
2
rubber-stamp(verb, support, maintain, back, declare)
2
shake down(verb, expression, check, examine, try)
2
stand up for(expression, idiom, support, hold, help)
2
try on(verb, expression, phrasal verb, check, examine)
2
vow(verb, support, maintain, back, declare)
1
absolve(verb, support, maintain, favor, sustain)
1
acquit(verb, support, maintain, favor, sustain)
1
act as a witness(verb, expression, idiom, support, maintain)
1
add up(verb, expression, show, determine)
1
alibi(verb, support, favor, sustain)
1
answer for(expression, support, back, legitimize)
1
argue(show, maintain, defend, uphold)
1
argue for(verb, expression, support, favor, sustain)
1
assess(verb, check, examine, try)
1
authorize(approve, sanction, endorse, prove)
1
avert(verb, support, maintain, back, declare)
1
be answerable for(verb, support, favor, sustain)
1
be responsible for(verb, support, maintain, back, declare)
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APASmart Define. (2015). substantiate thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/substantiate/thesaurus/synonyms
ChicagoSmart Define. 2015. "substantiate thesaurus" https://smartdefine.org/substantiate/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, substantiate thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/substantiate/thesaurus/synonyms>.
MLASmart Define. "substantiate thesaurus" 10 April 2015. Web. 27 September 2026. <https://smartdefine.org/substantiate/thesaurus/synonyms>