Nonvalid and Reasonable

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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Reasonable is an antonym for nonvalid.

Reasonable adjective - Based on sound reasoning or information.

Usage example: those playing rules sound reasonable to me

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Nonvalid is an antonym for reasonable.

Cite this Source

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

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

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

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