metropolis vs Sarajevo

metropolis and Sarajevo both are nouns.

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

metropolis (noun)	Sarajevo (noun)
people living in a large densely populated municipality	capital and largest city of Bosnia; scene of the assassination of Francis Ferdinand in 1914 which precipitated World War I
a large and densely populated urban area; may include several independent administrative districts