fashionable vs in

fashionable is not a noun while in is a noun.

Word	Noun	Adjective	Verb	Adverb
fashionable	No	Yes	No	No
in	Yes	Yes	No	Yes

fashionable (noun)	in (noun)
	a unit of length equal to one twelfth of a foot

fashionable (adjective)	in (adjective)
being or in accordance with current social fashions	currently fashionable
having elegance or taste or refinement in manners or dress	directed or bound inward
popular and considered appealing or fashionable at the time	holding office

fashionable (adverb)	in (adverb)
	to or toward the inside of