Astrakhan vs metropolis

Astrakhan and metropolis both are nouns.

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

Astrakhan (noun)	metropolis (noun)
a city in southwestern Russia on the delta of the Volga River	people living in a large densely populated municipality
	a large and densely populated urban area; may include several independent administrative districts