unfashionable vs old

unfashionable is not a noun while old is a noun.

Word	Noun	Adjective	Verb	Adverb
unfashionable	No	Yes	No	No
old	Yes	Yes	No	No

unfashionable (noun)	old (noun)
	past times

unfashionable (adjective)	old (adjective)
not in accord with or not following current fashion	of long duration; not new
unpopular and considered unappealing or unfashionable at the time	(used especially of persons) having lived for a relatively long time or attained a specific age
	skilled through long experience
	(used for emphasis) very familiar
	excellent
	just preceding something else in time or order
	belonging to some prior time