metropolis vs Cebu City

metropolis and Cebu City both are nouns.

Word	Noun	Adjective	Verb	Adverb
metropolis	Yes	No	No	No
Cebu City	Yes	No	No	No

metropolis (noun)	Cebu City (noun)
people living in a large densely populated municipality	an important seaport on the island of Cebu in the Philippines
a large and densely populated urban area; may include several independent administrative districts