Groundless and Well founded
Opposite meaning terms
Groundless
Groundless adjective - Having no basis in reason or fact.
Well founded is an antonym for groundless.
Nearby Words: ground, groundlessness
Well founded
Cite this Source
Well founded and Groundless. (2016). Retrieved 2026, August 01, from https://thesaurus.plus/related/groundless/well_founded
Groundless & Well founded. N.p., 2016. Web. 01 Aug. 2026. <https://thesaurus.plus/related/groundless/well_founded>.
Well founded or Groundless. 2016. Accessed August 01, 2026. https://thesaurus.plus/related/groundless/well_founded.
Google Ngram Viewer shows how "groundless" and "well founded" have occurred on timeline