61 entries under untruthful topic. ×

30
false(adjective, fake, unusual, counterfeit, dishonest)
22
dishonest(adjective, fake, false, counterfeit, dishonest)
18
deceitful(adjective, fake, false, counterfeit, dishonest)
12
double-dealing(adjective, false, dishonest, cunning, deceitful)
11
treacherous(adjective, false, dishonest, cunning, deceitful)
11
crafty(adjective, false, dishonest, cunning, deceitful)
10
mendacious(adjective, fake, false, counterfeit, dishonest)
10
perfidious(adjective, false, dishonest, deceitful, lying)
10
two-faced(adjective, smooth, false, dishonest, cunning)
10
deceptive(adjective, smooth, fake, false, counterfeit)
9
dissembling(adjective, smooth, false, dishonest, deceitful)
9
fraudulent(adjective, fake, false, counterfeit, dishonest)
9
lying(adjective, smooth, fake, false, counterfeit)
9
shifty(adjective, false, dishonest, cunning, deceitful)
9
unctuous(adjective, smooth, false, deceitful, lying)
8
crooked(adjective, false, dishonest, deceitful, lying)
8
untrustworthy(adjective, false, dishonest, cunning, deceitful)
7
wily(adjective, false, dishonest, cunning, deceitful)
6
cunning(adjective, false, dishonest, deceitful, lying)
6
underhanded(adjective, false, dishonest, cunning, deceitful)
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APASmart Define. (2016). insincere thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/insincere/thesaurus/synonyms
ChicagoSmart Define. 2016. "insincere thesaurus" https://smartdefine.org/insincere/thesaurus/synonyms (accessed October 1, 2026).
HarvardSmart Define 2016, insincere thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/insincere/thesaurus/synonyms>.
MLASmart Define. "insincere thesaurus" 14 March 2016. Web. 1 October 2026. <https://smartdefine.org/insincere/thesaurus/synonyms>