colorful vs gaudy

colorful is not a noun while gaudy is a noun.

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

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

colorful (adjective)	gaudy (adjective)
having much or varied color	(used especially of clothes) marked by conspicuous display
having color or a certain color; sometimes used in combination	tastelessly showy
striking in variety and interest