Fallacious and Sober
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
Sober is an antonym for fallacious.
Sober
Sober adjective - Based on sound reasoning or information.
Usage example: a sober assessment of the situation
Fallacious is an antonym for sober.
Cite this Source
Sober and Fallacious. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/fallacious/sober
Fallacious & Sober. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/fallacious/sober>.
Sober or Fallacious. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/fallacious/sober.
Google Ngram Viewer shows how "fallacious" and "sober" have occurred on timeline