brassy vs gaudy

brassy is not a noun while gaudy is a noun.

Word	Noun	Adjective	Verb	Adverb
brassy	No	Yes	No	No
gaudy	Yes	Yes	No	No

As adjectives, brassy and gaudy are synonyms defined as:

Other synonyms of brassy include cheap, flash, flashy, garish, gimcrack, loud, meretricious, tacky, tatty, tawdry, trashy.

brassy (noun)	gaudy (noun)
	(Britain) a celebratory reunion feast or entertainment held at a college

brassy (adjective)	gaudy (adjective)
resembling the sound of a brass instrument	(used especially of clothes) marked by conspicuous display
tastelessly showy	tastelessly showy
unrestrained by convention or propriety