Jidda vs urban center

Jidda and urban center both are nouns.

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

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