lingo vs vernacular

lingo and vernacular both are nouns.

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

As nouns, lingo and vernacular are synonyms defined as:

lingo and vernacular: a characteristic language of a particular group (as among thieves)

Other synonyms of lingo include argot, cant, jargon, patois, slang.

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

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