Billings vs city

Billings and city both are nouns.

Word	Noun	Adjective	Verb	Adverb
Billings	Yes	No	No	No
city	Yes	No	No	No

Billings (noun)	city (noun)
the largest city in Montana; located in southern Montana on the Yellowstone river	people living in a large densely populated municipality
	a large and densely populated urban area; may include several independent administrative districts
	an incorporated administrative district established by state charter