Preposterousness and Rationality

Opposite meaning words

Preposterousness noun - Lack of good sense or judgment.

Usage example: laughed at the sheer preposterousness of the idea

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Rationality is an antonym for preposterousness.

Rationality noun - The state of having good sense and sound judgment.

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Preposterousness is an antonym for rationality.

Cite this Source

Rationality and Preposterousness. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/preposterousness/rationality

Preposterousness & Rationality. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/preposterousness/rationality>.

Rationality or Preposterousness. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/preposterousness/rationality.

Google Ngram Viewer shows how "preposterousness" and "rationality" have occurred on timeline