7
calculating(adjective, mean, smooth, sharp, intelligent)
7
dishonourable
7
duplicitous(adjective, honest, dishonest, deceitful, untrustworthy)
7
sharp(adjective, mean, smooth, wrong, dishonest)
7
unethical(adjective, wrong, corrupt, dishonest, immoral)
6
concealed(adjective, dishonest, cunning, deceitful, secret)
6
hidden(adjective, cunning, secret, private, clandestine)
6
hypocritical
6
oblique(adjective, false, dishonest, cunning, deceitful)
6
perfidious(adjective, false, corrupt, dishonest, immoral)
6
skulking(adjective, secret, private, hidden, concealment)
6
sneaking(adjective, mean, smooth, smart, false)
6
underground(secret, hidden, spy, clandestine, fraudulent)
6
unfair(adjective, bad, wrong, false, dishonest)
6
unprincipled(adjective, bad, wrong, false, corrupt)
5
astute(adjective, mean, smooth, sharp, smart)
5
canny(adjective, mean, smooth, sharp, intelligent)
5
clever(adjective, sharp, smart, intelligent, cunning)
5
close(adjective, secret, concealment, sneaky, stealthy)
5
elusive(adjective, mean, smooth, smart, false)
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APASmart Define. (2015). underhand thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/underhand/thesaurus/synonyms
ChicagoSmart Define. 2015. "underhand thesaurus" https://smartdefine.org/underhand/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, underhand thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/underhand/thesaurus/synonyms>.
MLASmart Define. "underhand thesaurus" 13 April 2015. Web. 23 September 2026. <https://smartdefine.org/underhand/thesaurus/synonyms>