14
verifiable(adjective, clear, hard, sound, plain)
8
provable(adjective, clear, hard, sound, plain)
7
demonstrable(adjective, clear, hard, sound, plain)
6
supportable(adjective, true, real, demonstrable)
5
falsifiable
4
certain(adjective, valid, undoubtable)
3
checkable(adjective, true, real)
3
empirical(adjective, true, real)
2
certifiable(adjective, demonstrable)
2
empiric(adjective, true, real)
2
incontestable(adjective, certain)
2
indisputable
2
self-evident
2
testable(adjective, watertight, demonstrable, inferable)
2
undeniable
2
unquestionable
1
absolute
1
actual
1
axiomatic
1
definite
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APASmart Define. (2016). confirmable thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/confirmable/thesaurus/synonyms
ChicagoSmart Define. 2016. "confirmable thesaurus" https://smartdefine.org/confirmable/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2016, confirmable thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/confirmable/thesaurus/synonyms>.
MLASmart Define. "confirmable thesaurus" 29 March 2016. Web. 21 September 2026. <https://smartdefine.org/confirmable/thesaurus/synonyms>