Cebu City vs metropolis

Cebu City and metropolis both are nouns.

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

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