Cogent and Fallacious

Opposite meaning words

Cogent adjective - Having the power to persuade.

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Fallacious is an antonym for cogent.

Nearby Words: cogency, cogently

Fallacious adjective - Not using or following good reasoning.

Usage example: it's fallacious to say that something must exist because science hasn't proven its nonexistence

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Cogent is an antonym for fallacious.

Cite this Source

Fallacious and Cogent. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/cogent/fallacious

Cogent & Fallacious. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/cogent/fallacious>.

Fallacious or Cogent. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/cogent/fallacious.

Google Ngram Viewer shows how "cogent" and "fallacious" have occurred on timeline