urban center vs Dortmund

urban center and Dortmund both are nouns.

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

urban center (noun)	Dortmund (noun)
a large and densely populated urban area; may include several independent administrative districts	an industrial city in northwestern Germany; flourished from the 13th to 17th century as a member of the Hanseatic League