Nonrational and Substantiated

Opposite meaning words

Nonrational adjective - Not using or following good reasoning.

Usage example: was so upset that he was completely nonrational for a moment

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Substantiated is an antonym for nonrational.

Definitions of Nonrational not found.

Nonrational is an antonym for substantiated.

Cite this Source

Substantiated and Nonrational. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/nonrational/substantiated

Nonrational & Substantiated. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/nonrational/substantiated>.

Substantiated or Nonrational. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/nonrational/substantiated.

Google Ngram Viewer shows how "nonrational" and "substantiated" have occurred on timeline