Birdbrain
Birdbrain noun - A silly flighty person.
Usage example: those birdbrains who eagerly adopt every fad diet that comes along
Simpleton and birdbrain are semantically related in fool topic. In some cases you can use "Simpleton" instead a noun "Birdbrain", when it comes to topics like stupid person, stupid or ridiculous person, very stupid person.
Simpleton
Simpleton noun - A person who lacks good sense or judgment.
Usage example: his silly antics at office parties have earned him a reputation as a simpleton
Mutual synonyms
Cite this Source
Simpleton and Birdbrain. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/birdbrain/simpleton
Birdbrain & Simpleton. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/birdbrain/simpleton>.
Simpleton or Birdbrain. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/birdbrain/simpleton.
Google Ngram Viewer shows how "birdbrain" and "simpleton" have occurred on timeline