529 entries under adjective topic. ×

5
cheating(false, dishonest, cunning, deceitful)
5
disobedient(contrary, naughty, defiant, disobedient)
5
double-crossing(wrong, false, dishonest, cunning)
5
false-hearted(continue, false, dishonest, trust)
5
furtive(mean, smooth, smart, dishonest)
5
harmful(dangerous, injurious, detrimental)
5
malevolent(mean, bad, evil, unpleasant)
5
ominous(unpleasant, horrible, disagreeable, dreadful)
5
questionable(corrupt, dishonest, deceitful, unpredictable)
5
threatening(delicate, unpleasant, uncertain, horrible)
5
two-timing(wrong, false, dishonest, cunning)
5
unfair(false, dishonest, cunning, deceitful)
5
unsound(severe, delicate, false, awful)
4
Janus-faced
4
baneful(harmful, injurious, malevolent, detrimental)
4
bent(false, dishonest, immoral, deceitful)
4
conniving(mean, smooth, smart, dishonest)
4
criminal(evil, fake, corrupt, wicked)
4
delusive(mean, smooth, wrong, smart)
4
dissembling(mean, smooth, wrong, smart)
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APASmart Define. (2016). treacherous thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/treacherous/thesaurus/synonyms
ChicagoSmart Define. 2016. "treacherous thesaurus" https://smartdefine.org/treacherous/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2016, treacherous thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/treacherous/thesaurus/synonyms>.
MLASmart Define. "treacherous thesaurus" 4 March 2016. Web. 29 September 2026. <https://smartdefine.org/treacherous/thesaurus/synonyms>