Crazy
Crazy adjective - Having or showing a very abnormal or sick state of mind.
Usage example: a crazy woman who tried to throw her baby out of a window
Irrational is a synonym for crazy in raving topic. In some cases you can use "Irrational" instead an adjective "Crazy", when it comes to topics like senseless, unreasonable.
Irrational
Irrational adjective - Not using or following good reasoning.
Crazy is a synonym for irrational in illogical topic. You can use "Crazy" instead an adjective "Irrational", if it concerns topics such as senseless, raving. informal substitute
Nearby Words: irrationality, irrationally
Mutual synonyms
Both words in one sentence
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Crazy Enough to Work: His insanity gives him the ability to come up with bizarrely irrational but effective plans.
Source: Comic Book / The Creeper - She claims to be this, but given her extremely irrational behavior, the narrator is convinced that she's just crazy.
- Higurashi: When They Cry: One of the symptoms of going crazy in Hinamizawa is an overpowering, irrational sense of paranoia, so this theme pops up a lot in the series.
Source: Paranoia Fuel / Anime and Manga
Cite this Source
Irrational and Crazy. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/crazy/irrational
Crazy & Irrational. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/crazy/irrational>.
Irrational or Crazy. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/crazy/irrational.
Google Ngram Viewer shows how "crazy" and "irrational" have occurred on timeline