Forbidden
Forbidden adjective - That may not be permitted.
Usage example: trespassing is forbidden
Illegal is a synonym for forbidden in prohibited topic. In some cases you can use "Illegal" instead the word "Forbidden" as an adjective or an adverb, when it comes to topics like unapproved, unauthorised, outlawed.
Illegal
Illegal adjective - Contrary to or forbidden by law.
Usage example: it is illegal to import those birds into this country
Forbidden is a synonym for illegal in unlawful topic. You can use "Forbidden" instead the word "Illegal" as an adjective or an adverb, if it concerns topics such as prohibited, unapproved, unauthorised, outlawed.
Nearby Words: illegality, illegally
Mutual synonyms
Related pairs
- illegitimate and forbidden
- illegitimate and illegal
- unlawful and forbidden
- unlawful and illegal
- illicit and forbidden
- illicit and illegal
- lawless and forbidden
- lawless and illegal
- criminal and forbidden
- criminal and illegal
- wrongful and forbidden
- wrongful and illegal
- prohibited and forbidden
- prohibited and illegal
Both words in one sentence
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This was actually illegal and forbidden at the time, and Melville was told that he should either pay a fine or not make the film.
Source: Creator / Jean-Pierre Melville - Rules Lawyer: An entire race of them: the birds are forbidden from doing anything illegal, interpreted very, very broadly.
Source: Video Game / Birdland -
So don't go looking for an illegal copy of this tantalizingly interesting forbidden show.
Source: Do Not Do This Cool Thing
Cite this Source
Illegal and Forbidden. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/forbidden/illegal
Forbidden & Illegal. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/forbidden/illegal>.
Illegal or Forbidden. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/forbidden/illegal.
Google Ngram Viewer shows how "forbidden" and "illegal" have occurred on timeline