53 entries under certainly topic. ×

7
exactly(adverb, just, absolutely, really)
7
indisputably
7
yes(adverb, interjection, agreed, unmistakably)
6
precisely(good, fine, well, absolutely, really)
6
unconditionally(adverb, absolutely, exactly, agreed)
5
incontrovertibly
5
veritably(adverb, absolutely, very, really, exactly)
4
all right(expression, idiom, adverb, good, fine)
4
beyond question(adverb, absolutely, really, exactly)
4
for sure(expression, adverb, absolutely, exactly)
4
incontestably
3
irrefutably
3
without fail(expression, idiom, absolutely, clearly)
2
beyond doubt(expression, well, absolutely, clearly)
2
firmly(adverb, absolutely, really, exactly)
2
necessarily(adverb, inevitably)
2
okay(good, fine, agreed)
2
trustingly
2
very well(expression, good, fine, agreed)
1
agreed(good, fine, definitely)
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APASmart Define. (2016). positively thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/positively/thesaurus/synonyms
ChicagoSmart Define. 2016. "positively thesaurus" https://smartdefine.org/positively/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, positively thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/positively/thesaurus/synonyms>.
MLASmart Define. "positively thesaurus" 30 March 2016. Web. 23 September 2026. <https://smartdefine.org/positively/thesaurus/synonyms>