metropolis vs Gwangju

metropolis and Gwangju both are nouns.

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

metropolis (noun)	Gwangju (noun)
people living in a large densely populated municipality	city in southwestern South Korea; an important military base during the Korean War
a large and densely populated urban area; may include several independent administrative districts