dude vs beau

dude and beau both are nouns.

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

As nouns, dude and beau are synonyms defined as:

dude and beau: a man who is much concerned with his dress and appearance

Other synonyms of dude include clotheshorse, dandy, fashion plate, fop, gallant, sheik, swell.

dude (noun)	beau (noun)
a man who is much concerned with his dress and appearance	a man who is the lover of a man or woman
an informal form of address for a man	a man who is much concerned with his dress and appearance