3
detrimental(adjective, harmful, dangerous, injurious)
3
dicey(adjective, delicate, uncertain, unsound, rugged)
3
disaffected(adjective, contrary, untrue, untrustworthy, naughty)
3
disgraceful(shameful, disreputable)
3
disreputable(adjective, low, false, deceitful, lying)
3
dissimulating(adjective, wrong, false, dishonest, deceitful)
3
double-tongued
3
doubtful
3
fair-weather(adjective, dishonest, deceitful, unreliable, fickle)
3
fake(adjective, false, dishonest, deceitful, unpredictable)
3
fishy(false, dishonest, deceitful, tricky, misleading)
3
flagrant
3
hollow(adjective, wrong, false, dishonest, unpredictable)
3
hostile(adjective, hard, evil, rough, nasty)
3
inflammatory
3
injurious(adjective, harmful, dangerous, detrimental)
3
insurgent
3
intriguing(adjective, mean, smooth, cunning, deceitful)
3
mischievous(adjective, mean, smooth, cunning, knowing)
3
parlous(adjective, safety, dangerous)
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APASmart Define. (2016). treacherous thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/treacherous/thesaurus/synonyms
ChicagoSmart Define. 2016. "treacherous thesaurus" https://smartdefine.org/treacherous/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2016, treacherous thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/treacherous/thesaurus/synonyms>.
MLASmart Define. "treacherous thesaurus" 4 March 2016. Web. 27 September 2026. <https://smartdefine.org/treacherous/thesaurus/synonyms>