goofball vs zany

goofball and zany both are nouns.

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

As nouns, goofball and zany are synonyms defined as:

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

As nouns, zany is a hyponym of goofball; that is, zany is a word with a more specific, narrower meaning than goofball:

goofball: a person who amuses others by ridiculous behavior
zany: a buffoon in one of the old comedies; imitates others for ludicrous effect

Other hyponyms of goofball include harlequin, fool, jester, motley fool, whiteface.

goofball (noun)	zany (noun)
a man who is a stupid incompetent fool	a buffoon in one of the old comedies; imitates others for ludicrous effect
a person who amuses others by ridiculous behavior	a man who is a stupid incompetent fool

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