9
illegal(adjective, illegal, illegitimate, prohibition, pirate)
9
unauthorized(adjective, illegal, prohibition)
8
illicit(adjective, irregular, unwarranted, criminal, legal)
7
unlawful(adjective, illegal)
6
unaccredited
5
unlicenced
5
verboten(adjective, illegal)
4
contraband
3
forbidden(adjective, illegal)
3
criminal(adjective, irregular, unwarranted, illegal, illegitimate)
3
illegitimate(adjective, illegal)
3
impermissible
3
lawless(adjective, illegal)
3
outlawed(adjective, irregular, unwarranted, criminal, illegal)
3
prohibited(adjective, prohibition)
3
taboo(adjective, illegal)
3
unauthorised
3
unsanctioned
2
banned
2
bootleg(adjective, illegal)
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APASmart Define. (2015). unlicensed thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/unlicensed/thesaurus/synonyms
ChicagoSmart Define. 2015. "unlicensed thesaurus" https://smartdefine.org/unlicensed/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, unlicensed thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/unlicensed/thesaurus/synonyms>.
MLASmart Define. "unlicensed thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/unlicensed/thesaurus/synonyms>