Illegal
Illegal adjective - Contrary to or forbidden by law.
Usage example: it is illegal to import those birds into this country
Unauthorized is a synonym for illegal in unlawful topic. In some cases you can use "Unauthorized" instead an adjective "Illegal", when it comes to topics like unlicensed, against the law. popular alternative
Nearby Words: illegality, illegally
Unauthorized
Unauthorized adjective - Not endowed with authority.
Illegal is a synonym for unauthorized in unlawful topic. You can use "Illegal" instead an adjective "Unauthorized", if it concerns topics such as permitted, unapproved, disallowed. popular alternative
Nearby Word: unauthorised
Mutual synonyms
Related pairs
- crooked and illegal
- crooked and unauthorized
- illegitimate and illegal
- illegitimate and unauthorized
- unlawful and illegal
- unlawful and unauthorized
- illicit and illegal
- illicit and unauthorized
- lawless and illegal
- lawless and unauthorized
- criminal and illegal
- criminal and unauthorized
- wrongful and illegal
- wrongful and unauthorized
Both words in one sentence
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Since this was an unauthorized (and very illegal) mission, she tries to keep him from finding out, even when knocking from the inside of the trunk starts.
Source: Series / Agent Carter - Selling unauthorized drawings of copyrighted characters is illegal, but put it on a pay site and people are technically paying for the site, not the art.
Source: Loophole Abuse / Real Life - On the one hand, many large content groups (chief among them the RIAA, MPAA, IFPI, and video game distributors) argue that by preventing unauthorized copying, they ensure that artists are fairly compensated for their work and reduce the availability of illegal pirated content.
Source: DRM
Cite this Source
Unauthorized and Illegal. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/illegal/unauthorized
Illegal & Unauthorized. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/illegal/unauthorized>.
Unauthorized or Illegal. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/illegal/unauthorized.
Google Ngram Viewer shows how "illegal" and "unauthorized" have occurred on timeline