urban center vs Canton

urban center and Canton both are nouns.

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

urban center (noun)	Canton (noun)
a large and densely populated urban area; may include several independent administrative districts	a city on the Zhu Jiang delta in southern China; the capital of Guangdong province and a major deep-water port