vernacular vs Injun

vernacular and Injun both are nouns.

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

vernacular (noun)	Injun (noun)
the everyday speech of the people (as distinguished from literary language)	(slang) offensive term for Native Americans
a characteristic language of a particular group (as among thieves)

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