gaudy vs colorful

gaudy is a noun but colorful is not a noun.

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

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

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