Foundationless and Unfounded

Foundationless

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

Unfounded and foundationless are semantically related in justification topic. In some cases you can use "Unfounded" instead an adjective "Foundationless", when it comes to topics like unwarranted, not reasonable or right, without substantiation.

Unfounded

Unfounded adjective - Having no basis in reason or fact.
Usage example: the accusation proved to be unfounded

Foundationless and unfounded are semantically related in groundless topic. You can use "Foundationless" instead an adjective "Unfounded", if it concerns topics such as not based on fact.

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