5
unofficial(adjective, informal, unauthorized)
4
unconfirmed
3
false
2
changeable
1
fictitious(adjective, honest, untrue, factual)
1
hypothetical(adjective, assumed, guessed)
1
inconstant
1
indefinite
1
speculative
1
undecided
1
unfaithful
1
unsettled
1
unsound
1
unsubstantiated
1
untrue
1
vagabond
1
weak
0
doubtful(adjective, unclear, questionable)
0
fickle
0
academic
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APASmart Define. (2016). confirmed thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/confirmed/thesaurus/antonyms
ChicagoSmart Define. 2016. "confirmed thesaurus" https://smartdefine.org/confirmed/thesaurus/antonyms (accessed September 23, 2026).
HarvardSmart Define 2016, confirmed thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/confirmed/thesaurus/antonyms>.
MLASmart Define. "confirmed thesaurus" 26 February 2016. Web. 23 September 2026. <https://smartdefine.org/confirmed/thesaurus/antonyms>