urban center vs Arnhem

urban center and Arnhem both are nouns.

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

urban center (noun)	Arnhem (noun)
a large and densely populated urban area; may include several independent administrative districts	a city in the central Netherlands on the lower Rhine River; site of a battle in 1944 during World War II