Synonyms of nutter

nounAn eccentric, insane, crazy or reckless person.

• kookAn eccentric, strange or crazy person.
• odd duckAn unusual person, especially one with an idiosyncratic personality or peculiar behavioral characteristics.
• wackoAn amusingly eccentric or irrational person.
• nutA crazy person.
• nutcase
• nutjob
• nutbag
• loonyAn insane or very foolish person.
• bizarroWeirdo, misfit.
• coot
• crackpotAn eccentric, crazy or foolish person.
• eccentric
• freakA person who is extremely abnormal in appearance, social behavior, sexual orientation, gender identity, or business...
• glaik British, derogatoryA fool or eccentric person.
• hard case slang
• live one
• nutbarA crazy, eccentric person.
• oddball
• oddityA strange person; an oddball.
• odd bod British
• odd fishAn unusual thing or eccentric person.
• queerdo derogatory, vulgarA particularly strange LGBTQ+ person.
• strange birdAn unusual person, especially one with an idiosyncratic personality or peculiar behavioral characteristics.
• strange fishSynonym of odd fish.
• strangelingOne who is strange, foreign, or unusual; stranger.
• wack
• weirdieSomeone or something weird.
• weirdlingSomeone or something which is odd, weird, strange, or unusual; oddball; weirdie; weirdo.
• weirdo slang
• wild man
• wingnutA person who is or seems odd, eccentric, or crazy; especially, someone with bizarre or extreme political views.
• basket case
• basket weaver Australia
• crack
• crazyAn insane or eccentric person; a crackpot.
• crazyheadA crazy person; an eccentric.
• dingbat Australia, US
• fruit and nut case Australia, UK
• fruit cake
• fruit loop Australia, USA gayborhood area of Las Vegas.
• fruitloop Australia, USA crazy person; a lunatic.
• head caseUsed other than figuratively or idiomatically: see head, case.
• loony tuneA silly or crazy person; a person whose actions are unpredictable and irrational.
• lunaticAn insane person.
• madheadA crazy person.
• mental caseAn insane person; a nutcase.
• nut ball
• nutburger
• psycho
• psychoceramicA crackpot.
• schizoA mad or crazy person.
• screwball
• space cadet
• space pilot Australia
• unconventional euphemisticSomething or someone that is unconventional.
• wackadooA crazy person; wacko.
• wackadoodleA crazy, irrational, or eccentric person.
• whackjobA crazy, possibly dangerous, person.
• whacko
• space caseAn insane or eccentric person who has little grip on reality.
• crank British, datedA person who is considered strange or odd by others, and may behave in unconventional ways.
• queer fish British, datedAn odd or eccentric person.
• rum obsolete, slang
• madcap obsolete, rareAn insane person; a lunatic.