37 entries under underhanded topic. ×

6
treacherous(adjective, wrong, false, dishonest, cunning)
3
deceptive(adjective, wrong, false, dishonest, cunning)
3
insidious(dishonest, cunning, deceitful, treacherous, unfaithful)
2
deceitful(adjective, wrong, false, corrupt, dishonest)
2
dishonest(adjective, bad, wrong, false, corrupt)
2
fraudulent(adjective, false, dishonest, cunning, deceitful)
2
two-faced(adjective, bad, wrong, false, corrupt)
2
two-timing(adjective, bad, wrong, false, corrupt)
1
clandestine(dishonest, cunning, deceitful, sneaky)
1
crafty(adjective, false, dishonest, cunning, deceitful)
1
crooked(adjective, bad, wrong, false, corrupt)
1
cunning(adjective, false, dishonest, deceitful, lying)
1
devious(corrupt, dishonest, immoral, cunning, deceitful)
1
duplicitous(dishonest, cunning, deceitful, crooked, unfaithful)
1
guileful(adjective, wrong, false, dishonest, cunning)
1
indirect(dishonest, cunning, deceitful, crooked, sneaky)
1
oblique(dishonest, cunning, deceitful, crooked, sneaky)
1
shady(adjective, bad, wrong, false, corrupt)
1
shifty(adjective, wrong, false, dishonest, cunning)
1
slippery(adjective, bad, wrong, false, dishonest)
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APASmart Define. (2015). double-crossing thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/double-crossing/thesaurus/synonyms
ChicagoSmart Define. 2015. "double-crossing thesaurus" https://smartdefine.org/double-crossing/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, double-crossing thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/double-crossing/thesaurus/synonyms>.
MLASmart Define. "double-crossing thesaurus" 13 April 2015. Web. 23 September 2026. <https://smartdefine.org/double-crossing/thesaurus/synonyms>