50 entries under shady topic. ×

13
underhand(adjective, honest, false, dishonest, cunning)
11
corrupt(adjective, mean, bad, base, false)
10
dishonest(adjective, false, corrupt, dishonest, immoral)
9
crooked(adjective, mean, base, false, corrupt)
8
treacherous(adjective, mean, base, false, dishonest)
7
fraudulent(adjective, false, corrupt, dishonest, immoral)
7
unethical(adjective, corrupt, dishonest, immoral, cunning)
7
unscrupulous(adjective, mean, base, false, corrupt)
6
double-dealing(adjective, mean, base, false, corrupt)
5
immoral(adjective, low, corrupt, dishonest, deceitful)
5
mercenary(adjective, dishonest, immoral, rotten, untrustworthy)
5
praetorian(adjective, dishonest, immoral, rotten, untrustworthy)
5
two-faced(adjective, mean, base, false, dishonest)
4
foul(adjective, mean, base, corrupt, dishonest)
4
perfidious(adjective, mean, base, false, dishonest)
4
untrustworthy(adjective, mean, bad, base, false)
3
unfair(adjective, false, corrupt, dishonest, improper)
3
venal(adjective, mean, base, dishonest, immoral)
2
base(adjective, mean, corrupt, dishonest, immoral)
2
criminal(adjective, dishonest)
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APASmart Define. (2016). underhanded thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/underhanded/thesaurus/synonyms
ChicagoSmart Define. 2016. "underhanded thesaurus" https://smartdefine.org/underhanded/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, underhanded thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/underhanded/thesaurus/synonyms>.
MLASmart Define. "underhanded thesaurus" 22 January 2016. Web. 25 September 2026. <https://smartdefine.org/underhanded/thesaurus/synonyms>