Shanghai vs urban center

Shanghai and urban center both are nouns.

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

Shanghai (noun)	urban center (noun)
the largest city of China; located in the east on the Pacific; one of the largest ports in the world	a large and densely populated urban area; may include several independent administrative districts