sporty vs gaudy

sporty is not a noun while gaudy is a noun.

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

As adjectives, sporty and gaudy are synonyms defined as:

sporty and gaudy: (used especially of clothes) marked by conspicuous display

Other synonyms of sporty include flashy, jazzy, showy.

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

sporty (adjective)	gaudy (adjective)
appropriate for sport or engagement in a sport	(used especially of clothes) marked by conspicuous display
(used especially of clothes) marked by conspicuous display	tastelessly showy
exhibiting or calling for sportsmanship or fair play