Fallacious and Reasoned
Opposite meaning words
Fallacious
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
Reasoned is an antonym for fallacious.
Reasoned
Reasoned adjective - Based on sound reasoning or information.
Usage example: a candidate with a reasoned stance on this important issue
Fallacious is an antonym for reasoned.
Cite this Source
Reasoned and Fallacious. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/fallacious/reasoned
Fallacious & Reasoned. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/fallacious/reasoned>.
Reasoned or Fallacious. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/fallacious/reasoned.
Google Ngram Viewer shows how "fallacious" and "reasoned" have occurred on timeline