2
infamous(adjective, evil, vile, immoral, shady)
2
infernal
2
inglorious(adjective, vile, shady, dishonorable, disreputable)
2
lawless
2
lying(adjective, false, corrupt, dishonest, deceitful)
2
malevolent
2
malicious
2
mendacious(adjective, false, dishonest, deceitful, lying)
2
pitiless(adjective, vicious, savage, ruthless)
2
questionable
2
reprehensible(adjective, vice)
2
scandalous(adjective, wrong, corrupt, vile, dishonest)
2
shabby(vile, shady, dishonorable, disreputable, lowly)
2
sneaky(adjective, bad, wrong, false, dishonest)
2
thieving
2
unchaste(noun, corrupt, wicked, depraved, brazen)
2
underhanded(adjective, false, dishonest, immoral, deceitful)
2
unfaithful(adjective, dishonest, immoral, rotten, fickle)
2
unfitting(adjective, immoral, unethical)
2
unjust(adjective, wrong, dishonest, immoral, shocking)
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APASmart Define. (2015). unprincipled thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/unprincipled/thesaurus/synonyms
ChicagoSmart Define. 2015. "unprincipled thesaurus" https://smartdefine.org/unprincipled/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, unprincipled thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/unprincipled/thesaurus/synonyms>.
MLASmart Define. "unprincipled thesaurus" 13 April 2015. Web. 27 September 2026. <https://smartdefine.org/unprincipled/thesaurus/synonyms>