metropolis vs Oviedo

metropolis and Oviedo both are nouns.

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

metropolis (noun)	Oviedo (noun)
people living in a large densely populated municipality	a city in northwestern Spain near the Cantabrian Mountains
a large and densely populated urban area; may include several independent administrative districts