metropolis vs Lublin

metropolis and Lublin both are nouns.

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

metropolis (noun)	Lublin (noun)
people living in a large densely populated municipality	an industrial city of eastern Poland
a large and densely populated urban area; may include several independent administrative districts