Urmia vs urban center

Urmia and urban center both are nouns.

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

Urmia (noun)	urban center (noun)
a city on the western side of Lake Urmia in northwestern Iran	a large and densely populated urban area; may include several independent administrative districts
a shallow saline lake in northwestern Iran between Tabriz and the eastern border of Turkey