dude vs gallant

dude and gallant both are nouns.

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

As nouns, dude and gallant are synonyms defined as:

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

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

dude (noun)	gallant (noun)
a man who is much concerned with his dress and appearance	a man who attends or escorts a woman
an informal form of address for a man	a man who is much concerned with his dress and appearance

dude (adjective)	gallant (adjective)
	unflinching in battle or action
	being attentive to women like an ideal knight
	having or displaying great dignity or nobility
	lively and spirited