urban center vs Jeddah

urban center and Jeddah both are nouns.

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

urban center (noun)	Jeddah (noun)
a large and densely populated urban area; may include several independent administrative districts	port city in western Saudi Arabia on the Red Sea; near Mecca