Brainiac and Knucklehead

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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Knucklehead is an antonym for brainiac.

Knucklehead noun - A stupid person.

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Brainiac is an antonym for knucklehead.

Cite this Source

Knucklehead and Brainiac. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/brainiac/knucklehead

Brainiac & Knucklehead. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/brainiac/knucklehead>.

Knucklehead or Brainiac. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/brainiac/knucklehead.

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