metropolis vs Haifa

metropolis and Haifa both are nouns.

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

metropolis (noun)	Haifa (noun)
people living in a large densely populated municipality	a major port in northwestern Israel
a large and densely populated urban area; may include several independent administrative districts