35 entries under certainly topic. ×

36
really(adverb, interjection, true, truth, real)
26
absolutely(adverb, interjection, well, just, greatness)
20
indeed(noun, adverb, interjection, true, truth)
15
definitely(adverb, absolutely, really, exactly, positively)
14
unequivocally(adverb, just, greatness, absolutely, completely)
13
surely(adverb, well, absolutely, really, exactly)
10
unquestionably(adverb, well, absolutely, assent, really)
9
doubtless(adverb, certainty, likely, assent, really)
7
exactly(adverb, interjection, just, assent, really)
6
authentically(adverb, well, absolutely, really)
6
precisely(adverb, well, absolutely, assent, really)
6
undoubtedly(adverb, well, absolutely, very, really)
5
categorically(adverb, well, absolutely, really, exactly)
5
clearly(absolutely, really, definitely, decidedly)
5
decisively(adverb, really, exactly, positively)
5
in actuality(expression, adverb, well, absolutely)
5
unambiguously(adverb, really, exactly, positively)
5
undeniably(adverb, absolutely, very, much)
4
legitimately(adverb, well, absolutely, really)
3
without doubt(expression, adverb, absolutely, really)
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APASmart Define. (2016). truly thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/truly/thesaurus/synonyms
ChicagoSmart Define. 2016. "truly thesaurus" https://smartdefine.org/truly/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, truly thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/truly/thesaurus/synonyms>.
MLASmart Define. "truly thesaurus" 11 March 2016. Web. 23 September 2026. <https://smartdefine.org/truly/thesaurus/synonyms>