4
dodgy(adjective, untrustworthy, risky, dangerous, unsafe)
4
double(deceitful, lying, improbity, duplicitous, double-faced)
4
evasive
4
fast and loose(expression, adjective, idiom, dishonest, immoral)
4
faulty(adjective, unreliable, dangerous)
4
felonious(adjective, dishonest)
4
flagitious
4
iffy(adjective, unreliable, insecure, incalculable)
4
iniquitous(adjective, evil, corrupt, dishonest, immoral)
4
insubordinate(adjective, disobedient, rebellious)
4
irresponsible(adjective, dishonest, deceitful, unpredictable, unreliable)
4
malignant(adjective, dangerous, malevolent)
4
mutinous(adjective, disobedient)
4
nasty(adjective, bad, hard, rough, dark)
4
punic
4
rebellious(adjective, disobedient)
4
rotten(adjective, hard, evil, rough, nasty)
4
self-destructive
4
smooth(adjective, mean, cunning, deceitful, knowing)
4
trustless(adjective, dishonest, deceitful, unpredictable, unreliable)
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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>