unfashionable vs out of fashion

unfashionable and out of fashion both are adjectives.

Word	Noun	Adjective	Verb	Adverb
unfashionable	No	Yes	No	No
out of fashion	No	Yes	No	No

As adjectives, unfashionable and out of fashion are synonyms defined as:

unfashionable and out of fashion: unpopular and considered unappealing or unfashionable at the time

unfashionable (adjective)	out of fashion (adjective)
not in accord with or not following current fashion	unpopular and considered unappealing or unfashionable at the time
unpopular and considered unappealing or unfashionable at the time