Bremerhaven vs metropolis

Bremerhaven and metropolis both are nouns.

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

Bremerhaven (noun)	metropolis (noun)
a port city in northwestern Germany at the mouth of the Weser River on the North Sea; has a deep natural harbor and is an important shipping center	people living in a large densely populated municipality
	a large and densely populated urban area; may include several independent administrative districts