urban center vs Qom

urban center and Qom both are nouns.

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

urban center (noun)	Qom (noun)
a large and densely populated urban area; may include several independent administrative districts	a city in northwestern Iran; a place of pilgrimage for Shiite Muslims