metropolis vs Brest

metropolis and Brest both are nouns.

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

metropolis (noun)	Brest (noun)
people living in a large densely populated municipality	a port city in northwestern France (in Brittany); the chief naval station of France
a large and densely populated urban area; may include several independent administrative districts