Harebrained and Nonvalid

Harebrained

Harebrained adjective - Lacking in seriousness or maturity.

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

Nonvalid

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

Harebrained and nonvalid are semantically related. Sometimes you can use "Harebrained" instead an adjective "Nonvalid".
Cite this Source
Nonvalid and Harebrained. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/harebrained/nonvalid
Harebrained & Nonvalid. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/harebrained/nonvalid>.
Nonvalid or Harebrained. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/harebrained/nonvalid.
Google Ngram Viewer shows how "harebrained" and "nonvalid" have occurred on timeline