Groundless
Groundless adjective - Having no basis in reason or fact.
Lacking foundation and groundless are semantically related. In some cases you can use "Lacking foundation" instead an adjective "Groundless".
Nearby Words: ground, groundlessness
Lacking foundation
Groundless and lacking foundation are semantically related. You can use "Groundless" instead an adjective phrase "Lacking foundation".
Mutual synonyms
Cite this Source
Lacking foundation and Groundless. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/groundless/lacking_foundation
Groundless & Lacking foundation. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/groundless/lacking_foundation>.
Lacking foundation or Groundless. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/groundless/lacking_foundation.
Google Ngram Viewer shows how "groundless" and "lacking foundation" have occurred on timeline