Harebrained
Harebrained adjective - Lacking in seriousness or maturity.
Sudden and harebrained are semantically related. In some cases you can use "Sudden" instead an adjective "Harebrained".
Sudden
Sudden adjective - Not expected.
Harebrained and sudden are semantically related. Sometimes you can use "Harebrained" instead an adjective "Sudden".
Nearby Words: suddenly, suddenness
Mutual synonyms
Cite this Source
Sudden and Harebrained. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/harebrained/sudden
Harebrained & Sudden. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/harebrained/sudden>.
Sudden or Harebrained. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/harebrained/sudden.
Google Ngram Viewer shows how "harebrained" and "sudden" have occurred on timeline