metropolis vs Newport

metropolis and Newport both are nouns.

Word	Noun	Adjective	Verb	Adverb
metropolis	Yes	No	No	No
Newport	Yes	No	No	No

metropolis (noun)	Newport (noun)
people living in a large densely populated municipality	a port city in southeastern Wales
a large and densely populated urban area; may include several independent administrative districts	a resort city in southeastern Rhode Island; known for the summer homes of millionaires; important yachting center