gaudy vs cheap

gaudy is a noun but cheap is not a noun.

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

As adjectives, gaudy and cheap are synonyms defined as:

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

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

gaudy (adjective)	cheap (adjective)
(used especially of clothes) marked by conspicuous display	relatively low in price or charging low prices
tastelessly showy	of very poor quality; flimsy
	embarrassingly stingy
	tastelessly showy