Illegal and Invalid

Related words

Illegal adjective - Contrary to or forbidden by law.

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Invalid and illegal are semantically related. In some cases you can use "Invalid" instead the word "Illegal" as an adjective or a noun.

Nearby Words: illegality, illegally

Invalid adjective - Having no legal or binding force.

Usage example: the treaty is invalid once one side violates it

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Illegal and invalid are semantically related. Sometimes you can use "Illegal" instead the word "Invalid" as an adjective or a noun.

Cite this Source

Invalid and Illegal. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/illegal/invalid

Illegal & Invalid. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/illegal/invalid>.

Invalid or Illegal. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/illegal/invalid.

Google Ngram Viewer shows how "illegal" and "invalid" have occurred on timeline