Invalid and Plausible

Invalid

Invalid adjective - Not using or following good reasoning.
Usage example: an argument which has one untrue premise is invalid

Plausible is an antonym for invalid.

Plausible

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

Invalid is an antonym for plausible.

Nearby Words: plausibly, plausibility
Cite this Source
Plausible and Invalid. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/invalid/plausible
Invalid & Plausible. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/invalid/plausible>.
Plausible or Invalid. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/invalid/plausible.
Google Ngram Viewer shows how "invalid" and "plausible" have occurred on timeline