8
weirdo(noun, character, slang, crazy, wise)
7
nonsensical(adjective, foolish, crazy, mad, odd)
7
eccentric(noun, adjective, character, crazy, original)
6
Nut
6
cuckoo(noun, adjective, slang, mad, wise)
6
foolish(adjective, foolish, impractical, half-baked, doomed)
6
fruitcake(noun, character, crazy, mad, eccentric)
6
geek(noun, freak, oddball)
6
nut case(noun, expression, idiom, character, crazy)
6
zealot(noun, person, crazy, original, nut)
5
balmy(adjective, crazy, mad, odd, insane)
5
barmy(adjective, crazy, mad, odd, insane)
5
daft(adjective, crazy, mad, odd, insane)
5
loon(noun, informal, fool, crazy, mad)
5
wacko(noun, character, crazy, eccentric, lunatic)
5
wacky(adjective, crazy, mad, odd, insane)
4
character(original, eccentric, freak, dissentient, misfit)
4
crazed(adjective, crazy, mad, odd, insane)
4
ding-a-ling(noun, character, slang, wise, dissentient)
4
dingbat(noun, character, slang, crazy, wise)
11 years ago|15k views|share |citing 
APASmart Define. (2015). crackpot thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/crackpot/thesaurus/synonyms
ChicagoSmart Define. 2015. "crackpot thesaurus" https://smartdefine.org/crackpot/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, crackpot thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/crackpot/thesaurus/synonyms>.
MLASmart Define. "crackpot thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/crackpot/thesaurus/synonyms>