buster vs fellow

buster and fellow both are nouns.

Word	Noun	Adjective	Verb	Adverb
buster	Yes	No	No	No
fellow	Yes	No	No	No

As nouns, buster and fellow are synonyms defined as:

Other synonyms of buster include dude.

buster (noun)	fellow (noun)
a person (or thing) that breaks up or overpowers something	a boy or man
a person who breaks horses	a man who is the lover of a man or woman
a robust child	a friend who is frequently in the company of another
an informal form of address for a man	a person who is member of one's class or profession
a person born in the generation following the baby boom when the birth rate fell dramatically	an informal form of address for a man
	a member of a learned society
	one of a pair