vernacular vs bilgewater

vernacular and bilgewater both are nouns.

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

vernacular (noun)	bilgewater (noun)
the everyday speech of the people (as distinguished from literary language)	pretentious or silly talk or writing
a characteristic language of a particular group (as among thieves)

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