Crackbrained and Rational

Opposite meaning words

Crackbrained adjective - Having or showing a very abnormal or sick state of mind.

Usage example: had the crackbrained idea that he was receiving radio signals from outer space

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Rational is an antonym for crackbrained in crazy topic.

Rational adjective - Having the ability to reason.

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Crackbrained is an antonym for rational.

Cite this Source

Rational and Crackbrained. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/crackbrained/rational

Crackbrained & Rational. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/crackbrained/rational>.

Rational or Crackbrained. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/crackbrained/rational.

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