metropolis vs Astrakhan

metropolis and Astrakhan both are nouns.

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

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