metropolis vs Potsdam

metropolis and Potsdam both are nouns.

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

metropolis (noun)	Potsdam (noun)
people living in a large densely populated municipality	a city in northeastern Germany; site of the Potsdam Conference in the summer of 1945
a large and densely populated urban area; may include several independent administrative districts