gaudy vs garish

gaudy is a noun but garish is not a noun.

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

As adjectives, gaudy and garish are synonyms defined as:

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

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

gaudy (adjective)	garish (adjective)
(used especially of clothes) marked by conspicuous display	tastelessly showy
tastelessly showy