big bucks vs vernacular

big bucks and vernacular both are nouns.

Word	Noun	Adjective	Verb	Adverb
big bucks	Yes	No	No	No
vernacular	Yes	Yes	No	No

big bucks (noun)	vernacular (noun)
a large sum of money (especially as pay or profit)	the everyday speech of the people (as distinguished from literary language)
	a characteristic language of a particular group (as among thieves)

big bucks (adjective)	vernacular (adjective)
	being or characteristic of or appropriate to everyday language