1
straight out(expression, definite, precise, sure, decisive)
1
suggestive
1
surefire(adjective, solid, certain, sure, confident)
1
symptomatic
1
testable
1
true(clear, sound, reasonable, certain, absolute)
1
trusting(adjective, certain)
1
trustworthy(clear, sound, reasonable, rational, valid)
1
ultimate(sound, reasonable, rational, definite, precise)
1
unchallengeable
1
unchallenged
1
unconditional(adjective, definite, precise, sure, decisive)
1
unconfutable
1
uncontestable
1
unrefutable
1
verifiable
1
watertight
1
well-founded(sound, reasonable, rational, absolute, indisputable)
1
well-grounded(sound, reasonable, rational, absolute, indisputable)
1
what you see is what you get(expression, idiom, definite, precise, sure)
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APASmart Define. (2015). irrefutable thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/irrefutable/thesaurus/synonyms
ChicagoSmart Define. 2015. "irrefutable thesaurus" https://smartdefine.org/irrefutable/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, irrefutable thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/irrefutable/thesaurus/synonyms>.
MLASmart Define. "irrefutable thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/irrefutable/thesaurus/synonyms>