metropolis vs Canton

metropolis and Canton both are nouns.

Word	Noun	Adjective	Verb	Adverb
metropolis	Yes	No	No	No
Canton	Yes	No	No	No

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