jitters vs vernacular

jitters and vernacular both are nouns.

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

jitters (noun)	vernacular (noun)
extreme nervousness	the everyday speech of the people (as distinguished from literary language)
	a characteristic language of a particular group (as among thieves)

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