Credible and Foundationless

Credible

Credible adjective - Worthy of being accepted as true or reasonable.

Foundationless is an antonym for credible.

Foundationless

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

Credible is an antonym for foundationless.
Cite this Source
Foundationless and Credible. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/credible/foundationless
Credible & Foundationless. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/credible/foundationless>.
Foundationless or Credible. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/credible/foundationless.
Google Ngram Viewer shows how "credible" and "foundationless" have occurred on timeline