vernacular vs uncool

vernacular is a noun but uncool is not a noun.

Word	Noun	Adjective	Verb	Adverb
vernacular	Yes	Yes	No	No
uncool	No	Yes	No	No

vernacular (noun)	uncool (noun)
the everyday speech of the people (as distinguished from literary language)
a characteristic language of a particular group (as among thieves)

vernacular (adjective)	uncool (adjective)
being or characteristic of or appropriate to everyday language	(spoken slang) unfashionable and boring