trashy vs gaudy

trashy is not a noun while gaudy is a noun.

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

As adjectives, trashy and gaudy are synonyms defined as:

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

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

trashy (adjective)	gaudy (adjective)
tastelessly showy	(used especially of clothes) marked by conspicuous display
cheap and inferior; of no value	tastelessly showy