Nonvalid and Rational

Opposite meaning words

Nonvalid adjective - Having no basis in reason or fact.

Usage example: a nonvalid theory that most scientists rejected long ago

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Rational is an antonym for nonvalid.

Rational adjective - Based on sound reasoning or information.

Usage example: betting all of your savings on the lottery is not a rational move

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Nonvalid is an antonym for rational.

Cite this Source

Rational and Nonvalid. (2017). Retrieved 2026, August 14, from https://thesaurus.plus/related/nonvalid/rational

Nonvalid & Rational. N.p., 2017. Web. 14 Aug. 2026. <https://thesaurus.plus/related/nonvalid/rational>.

Rational or Nonvalid. 2017. Accessed August 14, 2026. https://thesaurus.plus/related/nonvalid/rational.

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