goofball vs buffoon

goofball and buffoon both are nouns.

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

As nouns, goofball and buffoon are synonyms defined as:

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

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