Taiyuan vs urban center

Taiyuan and urban center both are nouns.

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

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