vernacular vs niff

vernacular and niff both are nouns.

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

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

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