metropolis vs Colorado Springs

metropolis and Colorado Springs both are nouns.

Word	Noun	Adjective	Verb	Adverb
metropolis	Yes	No	No	No
Colorado Springs	Yes	No	No	No

metropolis (noun)	Colorado Springs (noun)
people living in a large densely populated municipality	a city in east central Colorado on the eastern edge of the Rocky Mountains; popular tourist center and site of the United States Air Force Academy
a large and densely populated urban area; may include several independent administrative districts