97 entries under noun topic. ×

40
crazy(adjective, person, light, weak)
30
lunatic(adjective, person, weak, simple)
25
nutty(adjective, light, weak, simple)
23
nuts(adjective, slang, wild, strange)
21
batty(adjective, light, slang, wild)
20
crackpot(adjective, person, foolish, crazy)
20
dotty(adjective, weak, simple, strange)
18
cuckoo(adjective, slang, wild, silly)
17
psychotic(adjective, person, silly, foolish)
15
kook(person, slang, sick, wise)
15
maniac(adjective, person, wrong, wild)
15
psycho(adjective, person, slang, crazy)
15
screwball(adjective, slang, wild, silly)
14
deranged(adjective, wild, silly, foolish)
14
madman(adjective, person, crazy, mad)
14
mental(adjective, slang, informal, foolish)
14
nut(slang, crazy, sick, wise)
12
loco(adjective, slang, insane, sane)
10
weirdo(slang, wise)
8
bedlamite(adjective, person, keen, warm)
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APASmart Define. (2015). loony thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/loony/thesaurus/synonyms
ChicagoSmart Define. 2015. "loony thesaurus" https://smartdefine.org/loony/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, loony thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/loony/thesaurus/synonyms>.
MLASmart Define. "loony thesaurus" 10 April 2015. Web. 28 September 2026. <https://smartdefine.org/loony/thesaurus/synonyms>