Brainiac and Fathead

Opposite meaning words

Brainiac noun - A very smart person.

Usage example: a techie who always has to have the latest gadget that the brainiacs in Silicon Valley have cooked up

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Fathead is an antonym for brainiac.

Fathead noun - A stupid person.

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Brainiac is an antonym for fathead.

Cite this Source

Fathead and Brainiac. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/brainiac/fathead

Brainiac & Fathead. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/brainiac/fathead>.

Fathead or Brainiac. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/brainiac/fathead.

Google Ngram Viewer shows how "brainiac" and "fathead" have occurred on timeline