Synonyms|323Antonyms|83|Broader|1Narrower|1Related|111
5
doubtfully
4
possibly
3
dubiously
3
i don't know
3
unclearly
2
questionably
2
uncertainly
2
indefinite(adjective, adverb, unmistakably, authentically, doubtfully)
2
undecidedly
1
ambiguously
1
allegedly
1
doubtful
1
in a way
0
apocryphal
0
apocryphally
0
apprehensively
0
arguably
0
bleakly
0
contentiously
0
contingently
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APASmart Define. (2015). undoubtedly thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/undoubtedly/thesaurus/antonyms
ChicagoSmart Define. 2015. "undoubtedly thesaurus" https://smartdefine.org/undoubtedly/thesaurus/antonyms (accessed September 23, 2026).
HarvardSmart Define 2015, undoubtedly thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/undoubtedly/thesaurus/antonyms>.
MLASmart Define. "undoubtedly thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/undoubtedly/thesaurus/antonyms>