40 entries under certainly topic. ×

5
incontestably
4
incontrovertibly
4
unequivocally
4
yes(positively, surely)
3
as expected(adverb, undoubtedly, indubitably)
3
doubtlessly
3
lucidly(adverb, positively, clearly, plainly)
3
veritably
2
indeed(adverb, unquestionably, undoubtedly, undeniably)
2
irrefutably
2
without a doubt(expression, idiom, adverb, positively)
1
by all means(adverb, absolutely, definitely, particularly)
1
irrefragably
1
openly(adverb, positively, clearly, plainly)
1
steadfastly
1
trustingly
0
agreed
0
all right(expression, positively)
0
okay
0
very well(expression, positively)
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APASmart Define. (2016). obviously thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/obviously/thesaurus/synonyms
ChicagoSmart Define. 2016. "obviously thesaurus" https://smartdefine.org/obviously/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2016, obviously thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/obviously/thesaurus/synonyms>.
MLASmart Define. "obviously thesaurus" 30 March 2016. Web. 20 September 2026. <https://smartdefine.org/obviously/thesaurus/synonyms>