Certain and Groundless

Opposite meaning words

Certain adjective - Known but not named.

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Groundless is an antonym for certain.

Nearby Words: certainty, certainly

Groundless adjective - Having no basis in reason or fact.

Usage example: fears of a strike proved groundless

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Certain is an antonym for groundless.

Nearby Words: ground, groundlessness

Cite this Source

Groundless and Certain. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/certain/groundless

Certain & Groundless. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/certain/groundless>.

Groundless or Certain. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/certain/groundless.

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