Kingston-upon Hull vs metropolis

Kingston-upon Hull and metropolis both are nouns.

Word	Noun	Adjective	Verb	Adverb
Kingston-upon Hull	Yes	No	No	No
metropolis	Yes	No	No	No

Kingston-upon Hull (noun)	metropolis (noun)
a large fishing port in northeastern England	people living in a large densely populated municipality
	a large and densely populated urban area; may include several independent administrative districts