38 entries under adjective topic. ×

16
doubtless(adverb, certain, limited, certainty)
10
without doubt(expression, idiom, adverb, absolutely)
9
sure(adverb, interjection, fine, certainty)
5
good(fine, assent, agreed)
1
able
1
accurate
1
actual
1
apt
1
capable
1
categorical
1
strong
0
adequate
0
chronic
0
cogent
0
competent
0
comprehensive
0
contrary
0
definite
0
deft
0
genuine
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APASmart Define. (2016). certainly thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/certainly/thesaurus/synonyms
ChicagoSmart Define. 2016. "certainly thesaurus" https://smartdefine.org/certainly/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, certainly thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/certainly/thesaurus/synonyms>.
MLASmart Define. "certainly thesaurus" 30 March 2016. Web. 22 September 2026. <https://smartdefine.org/certainly/thesaurus/synonyms>