Thesaurus:idiot

• addle-brain

• addlehead

• addle pate (obsolete)

• airhead

• baboon

• beanbrain

• beetlebrain

• beetlehead

• berk

• bimbo (slang)

• birdbrain

• blockhead (informal)

• blubberbrain

• bonehead (slang)

• Boeotian

• boob (informal)

• brickhead

• bubblehead

• bufflehead (obsolete)

• buffoon

• buttbreath

• Charlie (chiefly UK, often with "right" and/or "proper")

• chowderhead (US, informal)

• chucklehead (informal)

• chump (informal)

• cittern-head (obsolete)

• clod

• clot (UK, slang)

• clown

• crackhead

• cretin

• deadhead

• dimbo

• dim bulb

• dimbus

• dimwit

• dingbat (informal)

• ding dong (informal)

• dingleberry (slang)

• dingwad (informal)

• dip

• dipstick

• doldrum (slang, obsolete)

• dolt

• donut

• doodle (obsolete)

• doof

• doofoid

• doofus

• dope (slang)

• dork    [WS] (US, slang)

• drivel (obsolete)

• drongo (Australia, NZ, slang)

• drool bucket

• dullard

• dumb bunny

• dumbbell

• dumb cluck

• dumbhead

• dumble

• dumbling

• dumbnut

• dumbo

• dummkopf

• dummy

• dunce

• dunderhead

• dunderpate

• eejit (Irish/Scottish alternative form)

• farthead (slang)

• fathead

• featherbrain

• fenderhead

• fleabrain

• fool    [WS]

• fopdoodle (obsolete)

• fuck-knuckle

• galoot

• gomer

• gonk

• goober (Southern US)

• goose (slang)

• goosecap

• gorbuson (archaic, UK dialect)

• halfwit (informal)

• ha'porth (dated, UK, slang)

• hammerhead

• idiot

• ignoramus    [WS]

• imbecile

• inbred

• jackass

• jerk    [WS]

• juggins

• jughead

• knothead

• knucklehead

• lackwit

• lamebrain

• log (figuratively)

• loggerhead (obsolete)

• lummox

• lunk

• lunkhead

• maroon (slang)

• meatball (slang)

• meathead (slang)

• mental midget (informal)

• mome (obsolete)

• mongoloid

• mongtard

• moron (slang)

• mouth breather (slang)

• muggins (British, slang)

• mushhead

• muttonhead

• nimrod (US, informal)

• nincompoop

• ninny

• ninnyhammer

• nit (slang)

• nitwit

• noddy

• noodlehead

• numbskull

• oaf

• oligophrenic

• peabrain

• pillock (UK, slang)

• pigwidgeon (rare)

• pinhead

• plank (UK, slang)

• plonker (UK, slang)

• prat (UK, slang)

• put

• putz

• retard (slang)

• sap (slang)

• saphead

• schmo

• simp (slang)

• simpleton

• snapperhead (slang)

• sot (archaic)

• space cadet (slang)

• stupe (slang)

• stupid    [WS]

• stupid-head

• tard (slang)

• thickhead

• thickskull

• thicko (chiefly UK, slang)

• tomfool

• toolbox (slang)

• tosspot

• twit

• wally

• wantwit

• wazzer (UK, slang)

• wazzock (UK, slang)

• witless wonder (slang)

• yo-yo (informal)

Vulgar:

• ass (vulgar, slang)

• assclown (vulgar, slang)

• asshat (vulgar, slang)

• asshead (vulgar, slang)

• asshelmet (vulgar, slang)

• asstard (vulgar, slang)

• asswipe (vulgar, slang)

• dildo (vulgar, slang)

• dipshit (vulgar, slang)

• donkey dick (vulgar, slang)

• dumbarse (UK, vulgar, slang)
  • Alternative spelling of dumbass

• dumbfuck (vulgar, slang)

• dumbfucker (vulgar, slang)

• dumbshit (vulgar, slang)

• fucktard (vulgar, slang)

• fuckwit (vulgar, slang)

• peckerhead (vulgar, slang)

• shitbrain (vulgar, slang)

• shithead (vulgar, slang)

• shitneck (vulgar, slang)

• shitwit (vulgar, slang)

• stupidfuck (vulgar, slang)

• stupidfucker (vulgar, slang)

• twat (chiefly UK, vulgar, slang)

• genius    [WS]

• intelligent person    [WS]

• git    [WS]

• mentally deficient person    [WS]

• stupid    [WS]

• fool    [WS]

• foolish    [WS]

• insane    [WS]

• ignoramus    [WS]

• mad person    [WS]