Nonvalid and Substantiated

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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Substantiated is an antonym for nonvalid.

Definitions of Nonvalid not found.

Nonvalid is an antonym for substantiated.

Cite this Source

Substantiated and Nonvalid. (2017). Retrieved 2026, August 13, from https://thesaurus.plus/related/nonvalid/substantiated

Nonvalid & Substantiated. N.p., 2017. Web. 13 Aug. 2026. <https://thesaurus.plus/related/nonvalid/substantiated>.

Substantiated or Nonvalid. 2017. Accessed August 13, 2026. https://thesaurus.plus/related/nonvalid/substantiated.

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