11
bats
11
daffy(adjective, weak, simple, pleasant, happy)
11
goofy(adjective, light, foolish, stupid, crazy)
11
moronic(adjective, weak, simple, knowledge, ability)
10
bananas(adjective, slang, crazy, mad, sane)
10
crazed(adjective, wild, silly, foolish, stupid)
10
dippy(adjective, light, knowledge, slang, ability)
10
gaga(adjective, informal, insane, sane, distraught)
10
maniacal(adjective, silly, foolish, stupid, crazy)
10
touched(adjective, wrong, informal, wild, silly)
10
trippy
10
weirdo(noun, slang, wise)
9
asinine(adjective, weak, simple, careless, silly)
9
buggy(adjective, slang, silly, foolish, crazy)
9
fruity(adjective, slang, silly, foolish, insane)
9
harebrained(adjective, weak, simple, knowledge, ability)
9
imbecilic(adjective, weak, simple, knowledge, ability)
9
potty(adjective, wild, silly, foolish, stupid)
9
sappy(adjective, knowledge, slang, ability, foolish)
9
stupid(adjective, weak, simple, wrong, careless)
11 years ago|25k views|share |citing 
APASmart Define. (2015). loony thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/loony/thesaurus/synonyms
ChicagoSmart Define. 2015. "loony thesaurus" https://smartdefine.org/loony/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, loony thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/loony/thesaurus/synonyms>.
MLASmart Define. "loony thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/loony/thesaurus/synonyms>