metropolitan vs metropolis

metropolitan and metropolis both are nouns.

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

metropolitan (noun)	metropolis (noun)
a person who lives in a metropolis	people living in a large densely populated municipality
in the Eastern Orthodox Church this title is given to a position between bishop and patriarch; equivalent to archbishop in western Christianity	a large and densely populated urban area; may include several independent administrative districts

metropolitan (adjective)	metropolis (adjective)
relating to or characteristic of a metropolis