32 entries under certainly topic. ×

19
absolutely(adverb, well, absolutely, really)
14
unequivocally(adverb, level, absolutely, easily)
10
surely(adverb, absolutely, really, exactly, positively)
9
explicitly(adverb, absolutely, exactly, clearly)
7
unambiguously(adverb, really, exactly, positively)
7
unquestionably(adverb, absolutely, really, exactly, positively)
6
really(adverb, well, absolutely, exactly, positively)
5
conclusively(adverb, absolutely, really, exactly, positively)
5
truly(adverb, well, absolutely, really, exactly)
4
decisively(adverb, absolutely, really, exactly, positively)
4
exactly(adverb, flat, really, positively)
4
undeniably(adverb, level, absolutely, easily)
4
undoubtedly(adverb, well, absolutely, easily)
4
unmistakably(adverb, level, well, absolutely)
3
doubtless(absolutely, really, exactly, positively)
3
no ifs ands or buts(expression, idiom, level, absolutely, really)
3
no strings attached(expression, idiom, level, absolutely, really)
2
authentically(adverb, well, absolutely, really)
2
for a fact(expression, idiom, adverb, level, absolutely)
2
indeed(adverb, well, absolutely, really)
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APASmart Define. (2015). categorically thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/categorically/thesaurus/synonyms
ChicagoSmart Define. 2015. "categorically thesaurus" https://smartdefine.org/categorically/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, categorically thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/categorically/thesaurus/synonyms>.
MLASmart Define. "categorically thesaurus" 14 April 2015. Web. 24 September 2026. <https://smartdefine.org/categorically/thesaurus/synonyms>