Substantiated and Unfounded

Opposite meaning words

Definitions of Substantiated not found.

Unfounded is an antonym for substantiated.

Unfounded adjective - Having no basis in reason or fact.

Usage example: the accusation proved to be unfounded

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Substantiated is an antonym for unfounded in not based on fact topic.

Nearby Word: unfoundedly

Cite this Source

Unfounded and Substantiated. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/substantiated/unfounded

Substantiated & Unfounded. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/substantiated/unfounded>.

Unfounded or Substantiated. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/substantiated/unfounded.

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