colloquialism vs moonstruck

colloquialism is a noun but moonstruck is not a noun.

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

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

colloquialism (adjective)	moonstruck (adjective)
	insane and believed to be affected by the phases of the moon