Groundless and Substantiated

Opposite meaning words

Groundless adjective - Having no basis in reason or fact.

Usage example: fears of a strike proved groundless

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Substantiated is an antonym for groundless in justification topic.

Nearby Words: ground, groundlessness

Definitions of Groundless not found.

Groundless is an antonym for substantiated.

Cite this Source

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

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

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

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