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"Crazy" vs "Insane"

Both 'insane' and 'crazy' are adjectives used to describe someone or something as mentally unstable or irrational. They are often used interchangeably, but 'insane' is considered more formal and carries a stronger connotation of mental illness, while 'crazy' is more colloquial and can have a broader range of meanings.

Last Updated: March 25, 2024

Crazy

The word 'crazy' is a correct adjective used to describe someone or something as mentally unstable or irrational.

It is more colloquial than 'insane' and can have a broader range of meanings, including excitement or enthusiasm.

Examples:

  • She's crazy if she thinks she can finish that project in one day.
  • I'm crazy about the new restaurant in town.

Alternatives:

  • mad
  • nuts
  • bonkers
  • loony
  • off the wall

Insane

The word 'insane' is a correct adjective used to describe someone or something as mentally unstable or irrational.

It is more formal than 'crazy' and carries a stronger connotation of mental illness. It is often used in legal or medical contexts.

Examples:

  • The murderer was found to be legally insane.
  • The idea of jumping out of a plane seems insane to me.

Alternatives:

  • mentally unstable
  • irrational
  • mad
  • deranged
  • psychotic

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