Groundless and Sure
Opposite meaning words
Groundless
Groundless adjective - Having no basis in reason or fact.
Usage example: fears of a strike proved groundless
Sure is an antonym for groundless.
Nearby Words: ground, groundlessness
Sure
Sure adjective - Having or showing a mind free from doubt.
Groundless is an antonym for sure.
Nearby Word: surely
Cite this Source
Sure and Groundless. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/groundless/sure
Groundless & Sure. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/groundless/sure>.
Sure or Groundless. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/groundless/sure.
Google Ngram Viewer shows how "groundless" and "sure" have occurred on timeline