Potsdam vs urban center

Potsdam and urban center both are nouns.

Word	Noun	Adjective	Verb	Adverb
Potsdam	Yes	No	No	No
urban center	Yes	No	No	No

Potsdam (noun)	urban center (noun)
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