fashion vs come in

fashion is a noun but come in is not a noun.

Word	Noun	Adjective	Verb	Adverb
fashion	Yes	No	Yes	No
come in	No	No	Yes	No

fashion (noun)	come in (noun)
characteristic or habitual practice
consumer goods (especially clothing) in the current mode
how something is done or how it happens
the latest and most admired style in clothes and cosmetics and behavior

fashion (verb)	come in (verb)
make out of components (often in an improvising manner)	take a place in a competition; often followed by an ordinal
	to insert between other elements
	be received
	to come or go into
	come into fashion; become fashionable