poor white trash vs vernacular

poor white trash and vernacular both are nouns.

Word	Noun	Adjective	Verb	Adverb
poor white trash	Yes	No	No	No
vernacular	Yes	Yes	No	No

poor white trash (noun)	vernacular (noun)
(slang) an offensive term for White people who are impoverished	the everyday speech of the people (as distinguished from literary language)
	a characteristic language of a particular group (as among thieves)

poor white trash (adjective)	vernacular (adjective)
	being or characteristic of or appropriate to everyday language