Birdbrain
Birdbrain noun - A silly flighty person.
Usage example: those birdbrains who eagerly adopt every fad diet that comes along
Fool is a synonym for birdbrain in stupid person topic. In some cases you can use "Fool" instead a noun "Birdbrain", when it comes to topics like very stupid person.
Fool
Fool noun - A person who lacks good sense or judgment.
Usage example: only a fool would attempt to climb that mountain unprepared
Birdbrain is a synonym for fool in dope topic. You can use "Birdbrain" instead a noun "Fool", if it concerns topics such as stupid or ridiculous person. informal substitute
Mutual synonyms
Cite this Source
Fool and Birdbrain. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/birdbrain/fool
Birdbrain & Fool. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/birdbrain/fool>.
Fool or Birdbrain. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/birdbrain/fool.
Google Ngram Viewer shows how "birdbrain" and "fool" have occurred on timeline