122 entries under sure topic. ×

25
incontrovertible(adjective, clear, hard, certain, true)
23
undeniable(adjective, clear, hard, certain, true)
21
incontestable(adjective, certain, true, certainty)
21
unquestionable(adjective, correct, solid, exact, certain)
20
indisputable(adjective, certain, true, definite, precise)
18
certain(adjective, certain, true, definite)
17
indubitable(adjective, clear, firm, solid, physical)
17
positive(adjective, clear, certain, true, definite)
13
absolute(adjective, clear, certain, definite, precise)
12
conclusive(adjective, clear, certain, definite)
12
definite(adjective, clear, correct, firm, solid)
9
irrefragable(adjective, certain, definite, precise)
9
undoubted(adjective, clear, flat, firm, solid)
8
clear(adjective, certain, definite, precise)
8
decisive(adjective, clear, certain, definite, precise)
8
unequivocal(adjective, clear, certain, definite)
6
final(adjective, certain, definite, precise)
5
decided(adjective, clear, severe, solid, certain)
5
inarguable(adjective, clear, certain, true, definite)
5
real(adjective, clear, material, certain)
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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>