Foundationless and Invalid

Foundationless

Foundationless adjective - Having no basis in reason or fact.
Usage example: a careful investigation proved that the charges were foundationless

Invalid and foundationless are semantically related. In some cases you can use "Invalid" instead an adjective "Foundationless".

Invalid

Invalid adjective - Having no basis in reason or fact.
Usage example: an invalid claim that can be easily disproved by the facts

Foundationless and invalid are semantically related. Sometimes you can use "Foundationless" instead an adjective "Invalid".

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