- Definitions|2
- Thesaurus|797
- Abbreviations|0
| black-market(adjective, illegitimate, pirate, unlawful, prohibited) | |
| dirty(adjective, bad, wrong, corrupt, vicious) | |
| evil | |
| extralegal(adjective, illegitimate, unlawful, prohibited, illicit) | |
| false(adjective, wrong, fake, deceitful, worthless) | |
| impermissible | |
| incorrect(adjective, wrong) | |
| unwarrantable(adjective, wrong, unreasonable, improper, excessive) | |
| wicked(adjective, wrong, corrupt, unreasonable, dishonest) | |
| aberrant(adjective, wrong) | |
| abominable | |
| against the law(expression, adjective, idiom, wrong, illegitimate) | |
| contrary to law(expression, idiom, illicit) | |
| corrupt(adjective, bad, wrong, vicious, wicked) | |
| flawed(adjective, wrong) | |
| forbid | |
| misbegotten(adjective, illegitimate, illicit) | |
| nonlegal | |
| off-limits(adjective, adverb, prohibited, not) | |
| off limits(expression, adjective, adverb, offensive, permitted) |
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| APA | Smart Define. (2015). illegal thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/illegal/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "illegal thesaurus" https://smartdefine.org/illegal/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2015, illegal thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/illegal/thesaurus/synonyms>. |
| MLA | Smart Define. "illegal thesaurus" 10 April 2015. Web. 21 September 2026. <https://smartdefine.org/illegal/thesaurus/synonyms> |