Shiraz vs urban center

Shiraz and urban center both are nouns.

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

Shiraz (noun)	urban center (noun)
a city in central southwestern Iran; ruins of ancient Persepolis are nearby	a large and densely populated urban area; may include several independent administrative districts