Sarajevo vs metropolis

Sarajevo and metropolis both are nouns.

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

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