urban center vs Upsala

urban center and Upsala both are nouns.

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

urban center (noun)	Upsala (noun)
a large and densely populated urban area; may include several independent administrative districts	a city in east central Sweden to the northwest of Stockholm