5
cracked(adjective, simple, informal, silly, foolish)
5
dizzy(adjective, pleasant, happy, silly, cheerful)
5
fool
5
fruity(adjective, slang, sane)
5
kooky(adjective, weak, simple, silly, foolish)
5
moronic(adjective, weak, simple, slow, silly)
5
sappy(adjective, strange, silly, stupid, senseless)
4
balmy
4
bats
4
dumb(adjective, simple, slow, silly, foolish)
4
imbecile(foolish, crazy, insane)
4
inane(adjective, simple, silly, foolish, stupid)
4
inept
4
non compos mentis(adjective, law, sane)
4
potty(adjective, silly, foolish, crazy, mad)
4
preposterous(adjective, weak, simple, strange, foolish)
4
screwball
3
brainsick(adjective, sane)
3
bughouse
3
certifiable
11 years ago|17k views|share |citing 
APASmart Define. (2015). daffy thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/daffy/thesaurus/synonyms
ChicagoSmart Define. 2015. "daffy thesaurus" https://smartdefine.org/daffy/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, daffy thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/daffy/thesaurus/synonyms>.
MLASmart Define. "daffy thesaurus" 13 April 2015. Web. 20 September 2026. <https://smartdefine.org/daffy/thesaurus/synonyms>