Tangiers vs urban center

Tangiers and urban center both are nouns.

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

Tangiers (noun)	urban center (noun)
a city of northern Morocco at the west end of the Strait of Gibraltar	a large and densely populated urban area; may include several independent administrative districts