88 entries under noun topic. ×

14
nut(slang, sick, fanatic, patient)
13
screwball(slang, sick, fanatic, loony)
9
crackpot(character, nut, fanatic, freak)
9
psycho(slang, sick, nut, fanatic)
8
nutter(slang, sick, mad person)
7
crank
7
eccentric(character, freak, dissentient, misfit)
7
geek(freak, oddball)
7
kook(slang, sick, mad person)
7
loony(slang, sick, mad person)
6
fruitcake(character, freak, loony, oddball)
6
lunatic
6
madman(character, lunatic, loony, dissentient)
5
loon(slang, sick, nut, fanatic)
4
flake(slang, sick, fanatic, loony)
4
oddball(character, freak, patient, cuckoo)
4
psychopath(person, nut, fanatic, patient)
4
wacko(character, dissentient, misfit, lamebrain)
4
weirdo(character, freak, dissentient, misfit)
3
character(freak, dissentient, misfit, oddball)
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APASmart Define. (2015). nutcase thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/nutcase/thesaurus/synonyms
ChicagoSmart Define. 2015. "nutcase thesaurus" https://smartdefine.org/nutcase/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, nutcase thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/nutcase/thesaurus/synonyms>.
MLASmart Define. "nutcase thesaurus" 14 April 2015. Web. 23 September 2026. <https://smartdefine.org/nutcase/thesaurus/synonyms>