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
Foolish and fallacious are semantically related. In some cases you can use "Foolish" instead an adjective "Fallacious".
Foolish
Foolish adjective - Showing or marked by a lack of good sense or judgment.
Usage example: a foolish scheme that was supposed to make us all rich
Fallacious and foolish are semantically related. Sometimes you can use "Fallacious" instead an adjective "Foolish".
Mutual synonyms
Cite this Source
Foolish and Fallacious. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/fallacious/foolish
Fallacious & Foolish. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/fallacious/foolish>.
Foolish or Fallacious. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/fallacious/foolish.
Google Ngram Viewer shows how "fallacious" and "foolish" have occurred on timeline