niff vs vernacular

niff and vernacular both are nouns.

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

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

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