5
bughouse
5
cackle(noun, verb, ululation, ululate)
5
call(noun, verb, ululation, ululate)
5
caw(noun, verb, ululation, ululate)
5
chatter(noun, verb, ululation, ululate)
5
cluck(noun, verb, ululation, ululate)
5
coo(noun, verb, ululation, ululate)
5
eccentric(noun, adjective, silly, foolish, crazy)
5
fathead
5
gobble(noun, verb, ululation, ululate)
5
goofball
5
honk(noun, verb, ululation, ululate)
5
hoot(noun, verb, ululation, ululate)
5
inane(adjective, silly, foolish, unwise)
5
irrational(adjective, wrong, wild, silly, foolish)
5
maniacal(adjective, silly, stupid, crazy, mad)
5
nonsensical(adjective, silly, foolish, unwise)
5
out to lunch(expression, adjective, idiom, silly, mad)
5
parrot(noun, imitation, bird)
5
psychotic(noun, adjective, silly, foolish, stupid)
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APASmart Define. (2016). cuckoo thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/cuckoo/thesaurus/synonyms
ChicagoSmart Define. 2016. "cuckoo thesaurus" https://smartdefine.org/cuckoo/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, cuckoo thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/cuckoo/thesaurus/synonyms>.
MLASmart Define. "cuckoo thesaurus" 30 March 2016. Web. 22 September 2026. <https://smartdefine.org/cuckoo/thesaurus/synonyms>