Groundless and Invalid

Groundless

Groundless adjective - Having no basis in reason or fact.
Usage example: fears of a strike proved groundless

Invalid is a synonym for groundless in null and void topic. In some cases you can use "Invalid" instead an adjective "Groundless".

Nearby Words: ground, groundlessness

Invalid

Invalid adjective - Chronically or repeatedly suffering from poor health.

Groundless is a synonym for invalid in null and void topic. You can use "Groundless" instead an adjective "Invalid", if it concerns topics such as unjustified.

Cite this Source
Invalid and Groundless. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/groundless/invalid
Groundless & Invalid. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/groundless/invalid>.
Invalid or Groundless. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/groundless/invalid.
Google Ngram Viewer shows how "groundless" and "invalid" have occurred on timeline