Groundless and Substantial

Opposite meaning words

Groundless adjective - Having no basis in reason or fact.

Show all Definitions

Substantial is an antonym for groundless in baseless topic.

Nearby Words: ground, groundlessness

Substantial adjective - Having great meaning or lasting effect.

Show all Definitions

Groundless is an antonym for substantial.

Cite this Source

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

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

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

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