unfashionable vs unstylish

unfashionable and unstylish both are adjectives.

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

As adjectives, unfashionable and unstylish are synonyms defined as:

unfashionable and unstylish: not in accord with or not following current fashion

unfashionable (adjective)	unstylish (adjective)
not in accord with or not following current fashion	lacking in style or elegance
unpopular and considered unappealing or unfashionable at the time	not in accord with or not following current fashion