63 entries under certainly topic. ×

3
very well(expression, interjection, positively)
2
Agreed(interjection, positively)
2
Okay(interjection, positively)
2
authentically(adverb, absolutely, really, exactly)
2
even(just, absolutely, really, exactly, quite)
2
in truth(expression, absolutely, really, exactly)
2
irrefutably
2
without a doubt(expression, absolutely, really, exactly)
1
confirmedly(absolutely, very, really, exactly)
1
constantly(adverb, absolutely, very, really, exactly)
1
de facto(expression, absolutely, really, exactly)
1
devotedly(absolutely, very, really, exactly)
1
in actuality(expression, adverb, absolutely, really, exactly)
1
irrefragably
1
legitimately(absolutely, really, exactly, truly)
1
no ifs ands or buts(expression, absolutely, exactly, positively)
1
on the button(expression, idiom, just, exactly, positively)
1
righteously(absolutely, very, really, exactly)
1
steadfastly
1
steadily(absolutely, very, really, exactly)
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APASmart Define. (2016). definitely thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/definitely/thesaurus/synonyms
ChicagoSmart Define. 2016. "definitely thesaurus" https://smartdefine.org/definitely/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2016, definitely thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/definitely/thesaurus/synonyms>.
MLASmart Define. "definitely thesaurus" 18 February 2016. Web. 21 September 2026. <https://smartdefine.org/definitely/thesaurus/synonyms>