150 entries under adjective topic. ×

28
insane(noun, impractical, eccentric, half-baked)
21
crazy(noun, person, foolish, mad)
21
lunatic(noun, person, crazy, mad)
20
loony(noun, person, informal, foolish)
16
screwball(noun, person, character, slang)
15
madman(noun, person, crazy, mad)
13
psychotic(noun, person, mad, madness)
10
mad(crazy, odd, insane, lunatic)
10
wild(crazy, mad, odd, insane)
8
absurd(foolish, crazy, mad, odd)
8
oddball(noun, character, crazy, eccentric)
7
nonsensical(foolish, crazy, mad, odd)
7
eccentric(noun, character, crazy, original)
6
cuckoo(noun, slang, mad, wise)
6
foolish(foolish, impractical, half-baked, doomed)
5
balmy(crazy, mad, odd, insane)
5
barmy(crazy, mad, odd, insane)
5
daft(crazy, mad, odd, insane)
5
wacky(crazy, mad, odd, insane)
4
crazed(crazy, mad, odd, insane)
<12345…8>
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>