Synonyms of nincompoop

nounA foolish or silly person.

• dunderheadA stupid person; a dunce.
• fool
• imbecile
• nitwitA scatterbrained or stupid person.
• gabyA stupid, foolish person; a simpleton; a dunce.
• hammerhead
• putz
• asshat US, vulgarAn obnoxiously ignorant person; a fool.
• arsehole British, vulgar
• asshole US, vulgar
• berk BritishA fool, a prat, a twit, etc.
• birdbrainSomeone who is not intelligent.
• boneheadSomeone who is thick-skulled, stupid, or stubborn.
• bozo
• buffoon
• brickheadA stubbornly stupid person.
• Charlie British
• chucklehead
• chowderheadAn idiot; a dummy.
• chump
• clart
• clown
• der-brainA fool.
• dim bulbA person who is slow-witted or stupid.
• dimwitA person who is deficient in intelligence.
• dingleberry
• dingus
• dipshit vulgarA stupid, obnoxious, or undesirable person.
• dipstick
• dirtbrainA person of low intelligence.
• div
• divvo
• divvyA foolish person.
• doltA stupid person; a blockhead or dullard.
• donk
• doofusA person with poor judgment and taste; a foolish or silly person.
• dopeA stupid person.
• dork
• dotterel
• dullardA stupid person; a fool.
• dumbass US, vulgarA stupid or foolish person.
• dumbbell
• dumboA stupid person.
• dumb fuck US, vulgar
• dummy
• dunceAn unintelligent person.
• dupe
• fathead
• fenderheadA dolt.
• fuckwit vulgarA very stupid person.
• fuzznut slangA foolish person; a despised person.
• ginkA guy, a fellow, especially (derogatory) a foolish, unworldly, or socially inept man; a goof.
• gooberA foolish, simple, or amusingly silly person.
• gooseberry BritishA fool.
• gowk
• gubbins
• half-baked UK, dialectalA foolish or stupid person; a fool, an idiot.
• Homer SimpsonA person who is foolish, easily distracted, and/or gluttonous.
• ignoramus
• jamokeA stupid person, fool.
• jerk USA stupid person; an idiot or fool.
• jerkoff US, vulgar
• jolterhead
• joltheadA dunce; a blockhead.
• jugginsA fool; someone very credulous or easily fooled.
• jugheadA fool.
• knuckleheadAn idiot; a stupid or inept person.
• lamebrainA fool.
• mameluke (US (Italian-American)
• slang)
• maroonAn idiot; a fool.
• meathead
• mong British, vulgar
• moronA stupid person; an idiot; a fool.
• mug British
• muggins British
• mushheadA stupid person.
• nimrodA foolish person; an idiot.
• nit
• not the sharpest knife in the drawerLacking in intelligence; dimwitted.
• numskull
• numptyAn idiot, dolt or fool.
• oaf
• pillock BritishA stupid or annoying person; a simpleton; a fool.
• pinheadA foolish or stupid person.
• plonker British
• prat British
• retardA person or being who is extremely stupid or slow to learn.
• shit for brains vulgarAn unintelligent, foolish person; an idiot.
• shithead vulgar
• shitwit vulgarA very stupid person.
• schmoA stupid, obnoxious, pathetic, or otherwise contemptible person; a schmuck.
• schmuck US
• smooth brainA stupid person.
• snapperheadA dumbbell; a knucklehead.
• softheadA fool; a silly or feeble-minded person.
• sohai vulgarDumbass; idiot.
• stupid
• sucker
• thickheadA stupid person.
• tonto British
• tool
• tosser British, vulgar
• tosspot
• tubelight India, derogatoryA person who is slow to reply or understand; a dim-witted person.
• twat British, vulgar
• twerp
• twitAn annoying or foolish person.
• wally British
• wantwitA person wanting or lacking wit or sense; a fool.
• wazzock BritishA stupid or annoying person.
• yampy British
• alcatote obsoleteA foolish oaf.
• bayard archaic
• blither datedA foolish person; a fool, an idiot.
• bobchin obsoleteA fool.
• dill pickle US, dated
• doodle dated
• dote obsolete
• fiddle obsolete