89 entries under reason topic. ×

1
foundation(noun, cause, measure, idea)
1
inducement(noun, cause, base, call)
1
infrastructure(noun, support, action, cause)
1
justification(noun, support, action, power, cause)
1
logic(noun, case, claim, argument)
1
motive(noun, cause, base, call)
1
occasion(noun, cause, base, call)
1
pretext(noun, cover, cause, base)
1
rationale(noun, cause, idea, case)
1
root(noun, support, action, cause)
1
straight stuff(noun, expression, cause, base)
1
substratum(noun, support, action, cause)
1
underpinning(noun, support, action, cause)
1
vindication(noun, cause, idea, case)
1
why and wherefore(noun, expression, idiom, cause)
0
airtight case(expression, case, account, explanation)
0
allegation(case, account, explanation, excuse)
0
answer(case, account, explanation, excuse)
0
avowal(case, account, explanation, excuse)
0
call(basis, justification)
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APASmart Define. (2015). proof thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/proof/thesaurus/synonyms
ChicagoSmart Define. 2015. "proof thesaurus" https://smartdefine.org/proof/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, proof thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/proof/thesaurus/synonyms>.
MLASmart Define. "proof thesaurus" 22 December 2015. Web. 22 September 2026. <https://smartdefine.org/proof/thesaurus/synonyms>