81 entries under unprincipled topic. ×

22
dishonest(adjective, mean, bad, smooth, wrong)
21
sneaky(adjective, mean, bad, smooth, wrong)
19
crooked(adjective, mean, bad, smooth, wrong)
17
treacherous(adjective, mean, smooth, smart, false)
12
unscrupulous(adjective, mean, bad, smooth, wrong)
11
two-faced(adjective, bad, wrong, false, corrupt)
10
corrupt(adjective, bad, wrong, false, dishonest)
10
double-dealing(adjective, mean, smooth, smart, false)
10
shady(adjective, bad, wrong, false, corrupt)
10
slippery(adjective, bad, wrong, keen, sharp)
7
unethical(adjective, wrong, corrupt, dishonest, immoral)
6
perfidious(adjective, false, corrupt, dishonest, immoral)
6
unfair(adjective, bad, wrong, false, dishonest)
5
untrustworthy(adjective, false, dishonest, cunning, deceitful)
4
lying(adjective, false, corrupt, dishonest, cunning)
3
dirty(wrong, dishonest, immoral, deceitful)
3
traitorous(adjective, mean, smooth, smart, false)
3
untruthful(adjective, false, corrupt, dishonest, cunning)
2
amoral(corrupt, dishonest, immoral, fickle, untrustworthy)
2
bad(wrong, immoral)
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APASmart Define. (2015). underhand thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/underhand/thesaurus/synonyms
ChicagoSmart Define. 2015. "underhand thesaurus" https://smartdefine.org/underhand/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, underhand thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/underhand/thesaurus/synonyms>.
MLASmart Define. "underhand thesaurus" 13 April 2015. Web. 28 September 2026. <https://smartdefine.org/underhand/thesaurus/synonyms>