gaga vs colloquialism

gaga is not a noun while colloquialism is a noun.

Word	Noun	Adjective	Verb	Adverb
gaga	No	Yes	No	No
colloquialism	Yes	No	No	No

gaga (noun)	colloquialism (noun)
	a colloquial expression; characteristic of spoken or written communication that seeks to imitate informal speech

gaga (adjective)	colloquialism (adjective)
intensely enthusiastic about or preoccupied with
mentally or physically infirm with age