Assur vs urban center

Assur and urban center both are nouns.

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

Assur (noun)	urban center (noun)
an ancient Assyrian city on the Tigris and traditional capital of Assyria; just to the south of the modern city of Mosul in Iraq	a large and densely populated urban area; may include several independent administrative districts