Rational and Undiscerning

Opposite meaning words

Rational adjective - Having the ability to reason.

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Undiscerning is an antonym for rational.

Undiscerning adjective - Lacking discernment.

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Rational is an antonym for undiscerning in absent-minded topic.

Cite this Source

Undiscerning and Rational. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/rational/undiscerning

Rational & Undiscerning. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/rational/undiscerning>.

Undiscerning or Rational. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/rational/undiscerning.

Google Ngram Viewer shows how "rational" and "undiscerning" have occurred on timeline