Bremen vs metropolis

Bremen and metropolis both are nouns.

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

Bremen (noun)	metropolis (noun)
a city of northwestern Germany linked by the Weser River to the port of Bremerhaven and the North Sea; in the Middle Ages it was a leading member of the Hanseatic League	people living in a large densely populated municipality
	a large and densely populated urban area; may include several independent administrative districts