False and Nonvalid

False

False adjective - Not being in agreement with what is true.

Nonvalid and false are semantically related. In some cases you can use "Nonvalid" instead an adjective "False".

Nonvalid

Nonvalid adjective - Having no basis in reason or fact.
Usage example: a nonvalid theory that most scientists rejected long ago

False and nonvalid are semantically related. Sometimes you can use "False" instead an adjective "Nonvalid".
Cite this Source
Nonvalid and False. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/false/nonvalid
False & Nonvalid. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/false/nonvalid>.
Nonvalid or False. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/false/nonvalid.
Google Ngram Viewer shows how "false" and "nonvalid" have occurred on timeline