gimcrack vs gaudy

gimcrack and gaudy both are nouns.

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

As adjectives, gimcrack and gaudy are synonyms defined as:

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

gimcrack (noun)	gaudy (noun)
ornamental objects of no great value	(Britain) a celebratory reunion feast or entertainment held at a college

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