Noun

• fool

Colloquialisms or slang

• berk (British)
• Charlie (British, Australian)
• ha'porth (dated British)
• jerk (US)
• jerkoff (US)
• nit
• nitwit
• plonker (British)
• prat (British)
• schmuck (Yiddish)
• tosser (British)
• wally (British)

Taboo slang

• arsehole (British), asshole (US)
• fuckwit
• shit for brains
• twat (British)

Others

• halfwit
• idiot
• imbecile
• moron

See Also / WikiSaurus / Thesaurus Links

• see also - WikiSaurus:foolish, WikiSaurus:insane

• Wiktionary:Roget Thesaurus Classification

  4 Class IV. Words Relating to the Intellectual Faculties

  4.1 Division I. Formation of Ideas

  Section V. Results Of Reasoning

  499. Imbecility, Folly

• Macquarie Concise Thesaurus - FOOL