urban center vs Taiyuan

urban center and Taiyuan both are nouns.

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

urban center (noun)	Taiyuan (noun)
a large and densely populated urban area; may include several independent administrative districts	an ancient city in northeastern China noted for coal mining and steel production