69 entries under crooked topic. ×

12
fraudulent(adjective, fake, false, corrupt, dishonest)
11
sneaky(adjective, mean, smooth, smart, false)
10
villainous(adjective, mean, bad, evil, base)
9
nefarious(adjective, bad, corrupt, dishonest, immoral)
8
guileful(adjective, mean, smooth, wrong, smart)
8
underhanded(adjective, mean, base, false, dishonest)
8
unprincipled(adjective, low, false, corrupt, dishonest)
7
foul(adjective, mean, bad, base, dishonest)
7
inconstant(adjective, false, unstable, dishonest, immoral)
6
dishonorable(adjective, mean, hard, smooth, evil)
6
knavish(adjective, hard, evil, rough, nasty)
6
shady(adjective, false, corrupt, dishonest, immoral)
5
base(adjective, mean, bad, unpleasant, horrible)
5
double-crossing(adjective, wrong, false, dishonest, cunning)
5
furtive(adjective, mean, smooth, smart, dishonest)
5
two-timing(adjective, wrong, false, dishonest, cunning)
5
unfair(adjective, false, dishonest, cunning, deceitful)
4
bent(adjective, false, dishonest, immoral, deceitful)
4
fast and loose(expression, adjective, idiom, dishonest, immoral)
4
iniquitous(adjective, evil, corrupt, dishonest, immoral)
10 years ago|26k views|share |citing 
APASmart Define. (2016). treacherous thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/treacherous/thesaurus/synonyms
ChicagoSmart Define. 2016. "treacherous thesaurus" https://smartdefine.org/treacherous/thesaurus/synonyms (accessed October 1, 2026).
HarvardSmart Define 2016, treacherous thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/treacherous/thesaurus/synonyms>.
MLASmart Define. "treacherous thesaurus" 4 March 2016. Web. 1 October 2026. <https://smartdefine.org/treacherous/thesaurus/synonyms>