7
contraband(adjective, illegitimate, prohibition, pirate, unlawful)
7
improper(adjective, bad, wrong, dishonest, immoral)
7
bootleg(adjective, illegitimate, pirate, unlawful, prohibited)
6
foul(adjective, unreasonable, improper, unwarranted, prejudiced)
6
hot(adjective, informal)
6
interdicted
6
proscribed(adjective, offensive, permitted, illegitimate, unlawful)
6
unconstitutional(adjective, undueness)
6
undue(adjective, unreasonable, improper, excessive, unwarranted)
6
unfair(adjective, bad, wrong, corrupt, wicked)
6
unsanctioned(adjective, permitted, unjustified, pirate, unlawful)
5
dishonest(adjective, bad, wrong, fake, corrupt)
5
immoral(adjective, bad, wrong, corrupt, vicious)
5
iniquitous(adjective, wrong, corrupt, wicked, unreasonable)
5
punishable
5
shady(adjective, bad, wrong, corrupt, vicious)
5
unofficial
5
unwarranted(adjective, unreasonable, improper, excessive, iniquitous)
4
bad(adjective, wrong, wicked, unreasonable, immoral)
4
bent(adjective, wrong, senseless, unlawful, lawless)
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APASmart Define. (2015). illegal thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/illegal/thesaurus/synonyms
ChicagoSmart Define. 2015. "illegal thesaurus" https://smartdefine.org/illegal/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, illegal thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/illegal/thesaurus/synonyms>.
MLASmart Define. "illegal thesaurus" 10 April 2015. Web. 21 September 2026. <https://smartdefine.org/illegal/thesaurus/synonyms>