9 entries under illegal topic. ×
| forbidden(verb, adjective, irregular, restricted, unwarranted) | |
| proscribed(verb, adjective, irregular, unwarranted) | |
| outlawed(verb, adjective, adverb, irregular, unwarranted) | |
| illicit(adjective, adverb, irregular, unwarranted, legal) | |
| contraband(adjective, irregular, unwarranted, criminal) | |
| off limits(expression, adjective, idiom, offensive) | |
| not allowed(expression, idiom, offensive, permitted) | |
| no-no(adjective, unsanctioned, unapproved) | |
| unconstitutional |
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| APA | Smart Define. (2015). prohibited thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/prohibited/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "prohibited thesaurus" https://smartdefine.org/prohibited/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2015, prohibited thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/prohibited/thesaurus/synonyms>. |
| MLA | Smart Define. "prohibited thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/prohibited/thesaurus/synonyms> |