metropolis vs Bremen

metropolis and Bremen both are nouns.

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

metropolis (noun)	Bremen (noun)
people living in a large densely populated municipality	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
a large and densely populated urban area; may include several independent administrative districts