dude vs buster

dude and buster both are nouns.

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

As nouns, dude and buster are synonyms defined as:

Other synonyms of dude include fellow.

dude (noun)	buster (noun)
a man who is much concerned with his dress and appearance	a person (or thing) that breaks up or overpowers something
an informal form of address for a man	a person who breaks horses
	a robust child
	an informal form of address for a man
	a person born in the generation following the baby boom when the birth rate fell dramatically