fool vs goofball

fool and goofball both are nouns.

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

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

As nouns, goofball is a hypernym of fool; that is, goofball is a word with a broader meaning than fool:

fool: a professional clown employed to entertain a king or nobleman in the Middle Ages
goofball: a person who amuses others by ridiculous behavior

Other hypernyms of fool include buffoon, clown, goof, merry andrew.

fool (noun)	goofball (noun)
a person who lacks good judgment	a man who is a stupid incompetent fool
a person who is gullible and easy to take advantage of	a person who amuses others by ridiculous behavior
a professional clown employed to entertain a king or nobleman in the Middle Ages

fool (verb)	goofball (verb)
indulge in horseplay
fool or hoax
spend frivolously and unwisely
make a fool or dupe of