1
conscienceless
1
corrupted
1
covinous
1
debauched(adjective, dishonest, immoral, rotten, untrustworthy)
1
deluding(adjective, mean, bad, evil, base)
1
delusive(adjective, mean, bad, evil, false)
1
discreet(clandestine, underground, undisclosed)
1
disguised(secret, hidden, clandestine, underground, sneaky)
1
dishonourable
1
disreputable(adjective, false, dishonest, deceitful, lying)
1
dissembled(secret, hidden, clandestine, underground, undisclosed)
1
dissembling
1
dissimulated(clandestine, underground, undisclosed)
1
double-crossing(adjective, false, dishonest, cunning, deceitful)
1
doubtful
1
elusive(adjective, false, deceitful, lying, sly)
1
evil
1
exceeding(adjective, unreasonable, improper, excessive, unwarranted)
1
exploiting(adjective, dishonest, immoral, rotten, untrustworthy)
1
extortionate(adjective, dishonest, immoral, rotten, untrustworthy)
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APASmart Define. (2016). underhanded thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/underhanded/thesaurus/synonyms
ChicagoSmart Define. 2016. "underhanded thesaurus" https://smartdefine.org/underhanded/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, underhanded thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/underhanded/thesaurus/synonyms>.
MLASmart Define. "underhanded thesaurus" 22 January 2016. Web. 22 September 2026. <https://smartdefine.org/underhanded/thesaurus/synonyms>