bay window vs vernacular

bay window and vernacular both are nouns.

Word	Noun	Adjective	Verb	Adverb
bay window	Yes	No	No	No
vernacular	Yes	Yes	No	No

bay window (noun)	vernacular (noun)
a window that sticks out from the outside wall of a house	the everyday speech of the people (as distinguished from literary language)
slang for a paunch	a characteristic language of a particular group (as among thieves)

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