vernacular vs tummy

vernacular and tummy both are nouns.

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

vernacular (noun)	tummy (noun)
the everyday speech of the people (as distinguished from literary language)	an enlarged and muscular saclike organ of the alimentary canal; the principal organ of digestion
a characteristic language of a particular group (as among thieves)	slang for a paunch

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