metropolis vs Lanchou

metropolis and Lanchou both are nouns.

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

metropolis (noun)	Lanchou (noun)
people living in a large densely populated municipality	the capital city of the Chinese province of Gansu on the Yellow River
a large and densely populated urban area; may include several independent administrative districts