Synonyms|240Antonyms|9|Broader|1Narrower|0Related|71
15
absolutely(adverb, sure, just, completely, exactly)
13
definitely(just, absolutely, exactly, positively, certainly)
12
assuredly
9
certainly(adverb, sure, really, exactly, positively)
9
certainty
8
certain
8
surely(adverb, sure, just, absolutely, exactly)
6
cinch
6
for certain(expression, idiom, adverb, absolutely, completely)
5
absoluteness
5
accuracy
5
actuality
5
articulateness
5
assurance
5
authenticity
5
axiom
5
belief
5
cert
5
clarity
5
clearness
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APASmart Define. (2015). for sure thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/for_sure/thesaurus/synonyms
ChicagoSmart Define. 2015. "for sure thesaurus" https://smartdefine.org/for_sure/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, for sure thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/for_sure/thesaurus/synonyms>.
MLASmart Define. "for sure thesaurus" 14 April 2015. Web. 21 September 2026. <https://smartdefine.org/for_sure/thesaurus/synonyms>