metropolis vs Braunschweig

metropolis and Braunschweig both are nouns.

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

metropolis (noun)	Braunschweig (noun)
people living in a large densely populated municipality	a city in central Germany
a large and densely populated urban area; may include several independent administrative districts