Invalid and Substantiated

Opposite meaning words

Invalid adjective - Not using or following good reasoning.

Usage example: an argument which has one untrue premise is invalid

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Substantiated is an antonym for invalid.

Definitions of Invalid not found.

Invalid is an antonym for substantiated.

Cite this Source

Substantiated and Invalid. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/invalid/substantiated

Invalid & Substantiated. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/invalid/substantiated>.

Substantiated or Invalid. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/invalid/substantiated.

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