18
counterfeit(adjective, fake, honest, false, genuine)
18
fake(adjective, false, genuine)
11
unreal(adjective, fake, false, real, hypothetical)
11
false(adjective, open, sound, right, fake)
9
artificial
9
bogus(adjective, counterfeit, genuine)
6
spurious(adjective, fake, counterfeit, true)
5
unauthorized(adjective, fake, false)
4
hypocritical(adjective, deceitful, pretending)
3
fictitious(adjective, honest, factual)
3
fraudulent(adjective, open, false, genuine, deceptive)
3
mock(adjective, fake, true, artificial)
3
phony(adjective, genuine)
3
sham(noun, real)
3
surreal(adjective, true)
3
untrustworthy(adjective, fake, false)
2
apocryphal(adjective, fake, questionable)
2
factitious
2
invalid(adjective, fake, false)
2
pseudo
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APASmart Define. (2016). authentic thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/authentic/thesaurus/antonyms
ChicagoSmart Define. 2016. "authentic thesaurus" https://smartdefine.org/authentic/thesaurus/antonyms (accessed September 21, 2026).
HarvardSmart Define 2016, authentic thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/authentic/thesaurus/antonyms>.
MLASmart Define. "authentic thesaurus" 31 March 2016. Web. 21 September 2026. <https://smartdefine.org/authentic/thesaurus/antonyms>