2
bats in the belfry(expression, idiom, silly, foolish, mad)
2
berserk(adjective, silly, foolish, crazy, mad)
2
bizarre(adjective, wrong, wild, silly, foolish)
2
booby(noun, bird)
2
carol
2
cat
2
chirr
2
dingbat(noun, slang, wise)
2
dumb
2
erratic(silly, foolish, mad, insane, unwise)
2
flake(noun, slang, mad, sick, mad person)
2
flipped(silly, foolish, mad, insane, unwise)
2
flipped out(expression, silly, foolish, crazy, mad)
2
freaked out(expression, silly, foolish, mad, insane)
2
frenzied(adjective, wrong, silly, foolish, stupid)
2
hare-brained(zany, comical, schtick)
2
imbecile
2
imbecilic
2
irresponsible(adjective, wrong, wild, silly, foolish)
2
luny(noun, adjective, slang, sick, mad person)
10 years ago|19k views|share |citing 
APASmart Define. (2016). cuckoo thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/cuckoo/thesaurus/synonyms
ChicagoSmart Define. 2016. "cuckoo thesaurus" https://smartdefine.org/cuckoo/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, cuckoo thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/cuckoo/thesaurus/synonyms>.
MLASmart Define. "cuckoo thesaurus" 30 March 2016. Web. 23 September 2026. <https://smartdefine.org/cuckoo/thesaurus/synonyms>