Christchurch vs metropolis

Christchurch and metropolis both are nouns.

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

Christchurch (noun)	metropolis (noun)
industrial city at the center of a rich agricultural region	people living in a large densely populated municipality
	a large and densely populated urban area; may include several independent administrative districts