Crazy
Crazy adjective - Showing or marked by a lack of good sense or judgment.
Usage example: a crazy plan to climb Mount Everest without proper equipment
Fallacious and crazy are semantically related. In some cases you can use "Fallacious" instead an adjective "Crazy".
Fallacious
Fallacious adjective - Not using or following good reasoning.
Crazy and fallacious are semantically related. Sometimes you can use "Crazy" instead an adjective "Fallacious".
Mutual synonyms
Both words in one sentence
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Jesus Was Crazy: Famously, Mere Christianity popularized the so-called "trilemma" argument in favor of the deity of Jesus: if Jesus wasn't God, then it's fallacious to say He was "a great moral teacher," since an actual great moral teacher would be humble rather than claiming to be God as Jesus did.
Source: Creator / C. S. Lewis
Cite this Source
Fallacious and Crazy. (2016). Retrieved 2026, August 07, from https://thesaurus.plus/related/crazy/fallacious
Crazy & Fallacious. N.p., 2016. Web. 07 Aug. 2026. <https://thesaurus.plus/related/crazy/fallacious>.
Fallacious or Crazy. 2016. Accessed August 07, 2026. https://thesaurus.plus/related/crazy/fallacious.
Google Ngram Viewer shows how "crazy" and "fallacious" have occurred on timeline