Fatuous and Rational

Fatuous

Fatuous adjective - Not having or showing an ability to absorb ideas readily.
Usage example: the fatuous questions that the audience members asked after the lecture suggested to the oceanographer that they had understood little

Rational is an antonym for fatuous.

Nearby Words: fatuity, fatuousness, fatuously

Rational

Rational adjective - Having the ability to reason.
Usage example: human beings are rational creatures

Fatuous is an antonym for rational.

Cite this Source
Rational and Fatuous. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/fatuous/rational
Fatuous & Rational. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/fatuous/rational>.
Rational or Fatuous. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/fatuous/rational.
Google Ngram Viewer shows how "fatuous" and "rational" have occurred on timeline