4
unfounded(adjective, wrong, fake, counterfeit, dishonest)
4
wily(adjective, false, dishonest, cunning, deceitful)
3
bogus(adjective, wrong, fake, counterfeit, dishonest)
3
counterfactual(adjective, wrong, fake, false, counterfeit)
3
cunning(adjective, false, dishonest, deceitful, lying)
3
devious(adjective, evil, false, corrupt, dishonest)
3
disreputable(adjective, false, dishonest, deceitful, lying)
3
fabricated(adjective, fake, false, counterfeit, sham)
3
fictitious(adjective, wrong, fake, false, counterfeit)
3
inexact(adjective, wrong, fake, false, counterfeit)
3
intentionally untrue
3
knavish
3
mistaken(verb, adjective, wrong, fake, false)
3
phoney orphony
3
pseudo(adjective, fake, counterfeit, sham, phony)
3
roguish(adjective, deceitful)
3
slippery(adjective, false, dishonest, deceitful, lying)
3
sly(adjective, false, dishonest, deceitful, dubious)
3
truthless(adjective, true)
3
underhand(adjective, false, corrupt, dishonest, cunning)
11 years ago|14k views|share |citing 
APASmart Define. (2015). untruthful thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/untruthful/thesaurus/synonyms
ChicagoSmart Define. 2015. "untruthful thesaurus" https://smartdefine.org/untruthful/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, untruthful thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/untruthful/thesaurus/synonyms>.
MLASmart Define. "untruthful thesaurus" 14 April 2015. Web. 27 September 2026. <https://smartdefine.org/untruthful/thesaurus/synonyms>