zany vs cuckoo

zany and cuckoo both are nouns.

Word	Noun	Adjective	Verb	Adverb
zany	Yes	Yes	No	No
cuckoo	Yes	No	Yes	No

As nouns, zany and cuckoo are synonyms defined as:

Other synonyms of zany include bozo, fathead, goof, goofball, goose, jackass, twat.

zany (noun)	cuckoo (noun)
a buffoon in one of the old comedies; imitates others for ludicrous effect	any of numerous European and North American birds having pointed wings and a long tail
a man who is a stupid incompetent fool	a man who is a stupid incompetent fool

zany (adjective)	cuckoo (adjective)
ludicrous, foolish
like a clown

zany (verb)	cuckoo (verb)
	repeat monotonously, like a cuckoo repeats his call