urban center vs Natal

urban center and Natal both are nouns.

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

urban center (noun)	Natal (noun)
a large and densely populated urban area; may include several independent administrative districts	a region of eastern South Africa on the Indian Ocean
	a port city in northeastern Brazil