Sur vs urban center

Sur and urban center both are nouns.

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

Sur (noun)	urban center (noun)
a port in southern Lebanon on the Mediterranean Sea; formerly a major Phoenician seaport famous for silks	a large and densely populated urban area; may include several independent administrative districts