picayune vs colloquialism

picayune is not a noun while colloquialism is a noun.

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

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

picayune (adjective)	colloquialism (adjective)
(informal) small and of little importance