urban center vs Marrakech

urban center and Marrakech both are nouns.

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

urban center (noun)	Marrakech (noun)
a large and densely populated urban area; may include several independent administrative districts	a city in western Morocco; tourist center