Synonyms of the word

paranoid

• adj. Of, related to, or suffering from paranoia.
• adj. Exhibiting extreme and irrational fear or distrust of others.
• n. Someone suffering from paranoia.

insane

• adj. Exhibiting unsoundness or disorder of mind; not sane; mad; deranged in mind; delirious; distracted.
• adj. Used by, or appropriated to, insane persons.
• adj. Causing insanity or madness.
• adj. Characterized by insanity or the utmost folly; ridiculous; unpractical.

paranoiac

• adj. Pertaining to, or exhibiting, paranoia.
• n. Somebody who has paranoia, a paranoid person.

psycho

• adj. (colloquial or pejorative) Psychotic, or otherwise insane.
• n. (pejorative, slang) A person who is psychotic or otherwise insane.
• n. (pejorative, slang) A person who acts in a bizarre or dangerous manner.
• n. (informal) A class, at a college or university, in which psychology is taught.

psychotic

• adj. Of, related to, or suffering from psychosis.
• n. A person affected by psychosis.