tacky vs gimcrack

tacky is not a noun while gimcrack is a noun.

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

As adjectives, tacky and gimcrack are synonyms defined as:

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

tacky (noun)	gimcrack (noun)
	ornamental objects of no great value

tacky (adjective)	gimcrack (adjective)
tastelessly showy	tastelessly showy
(of a glutinous liquid such as paint) not completely dried and slightly sticky to the touch