All loon synonyms

noun loon

• crazy — If you describe someone or something as crazy, you think they are very foolish or strange.
• lunatic — (no longer in technical use; now considered offensive) an insane person.
• maniac — Mathematical Analyzer, Numerical Integrator and Computer
• eccentric — deviating from the recognized or customary character, practice, etc.; irregular; erratic; peculiar; odd: eccentric conduct; an eccentric person.
• nut — the goddess of the sky, sometimes shown as a cow bearing Ra on her back and the stars on her underside.
• psychopath — a person with a psychopathic personality, which manifests as amoral and antisocial behavior, lack of ability to love or establish meaningful personal relationships, extreme egocentricity, failure to learn from experience, etc.
• sociopath — a person with a psychopathic personality whose behavior is antisocial, often criminal, and who lacks a sense of moral responsibility or social conscience.
• nut case — a deranged person; lunatic.
• crackpot — If you describe someone or their ideas as crackpot, you disapprove of them because you think that their ideas are strange and crazy.