buffoon vs goofball

buffoon and goofball both are nouns.

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

As nouns, buffoon and goofball are synonyms defined as:

Other synonyms of buffoon include clown, goof, merry andrew.

buffoon (noun)	goofball (noun)
a person who amuses others by ridiculous behavior	a man who is a stupid incompetent fool
a rude or vulgar fool	a person who amuses others by ridiculous behavior