Mazar-i-Sharif vs urban center

Mazar-i-Sharif and urban center both are nouns.

Word	Noun	Adjective	Verb	Adverb
Mazar-i-Sharif	Yes	No	No	No
urban center	Yes	No	No	No

Mazar-i-Sharif (noun)	urban center (noun)
a city in northern Afghanistan	a large and densely populated urban area; may include several independent administrative districts