Lublin vs metropolis

Lublin and metropolis both are nouns.

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

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