6
cruel
5
black
5
dark(adjective, bad, evil, immoral, black)
5
in an unlawful manner
4
amerciable
4
banned
4
black-market
4
bootleg
4
contraband
4
crime scene
4
illegitimate(adjective, law)
4
mislabeled
4
penal
4
prohibited
3
criminal(adjective, crimes)
3
dirty
3
embezzled
3
extrajudicial
3
extralegal
3
felonious
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APASmart Define. (2015). illegal thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/illegal/thesaurus/related
ChicagoSmart Define. 2015. "illegal thesaurus" https://smartdefine.org/illegal/thesaurus/related (accessed September 21, 2026).
HarvardSmart Define 2015, illegal thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/illegal/thesaurus/related>.
MLASmart Define. "illegal thesaurus" 10 April 2015. Web. 21 September 2026. <https://smartdefine.org/illegal/thesaurus/related>