vernacular vs bunk off

vernacular is a noun but bunk off is not a noun.

Word	Noun	Adjective	Verb	Adverb
vernacular	Yes	Yes	No	No
bunk off	No	No	Yes	No

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

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

vernacular (verb)	bunk off (verb)
	play truant from work or school