fashion plate vs dude

fashion plate and dude both are nouns.

Word	Noun	Adjective	Verb	Adverb
fashion plate	Yes	No	No	No
dude	Yes	No	No	No

As nouns, fashion plate and dude are synonyms defined as:

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

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

fashion plate (noun)	dude (noun)
a plate illustrating the latest fashion in dress	a man who is much concerned with his dress and appearance
a man who is much concerned with his dress and appearance	an informal form of address for a man