Karbala vs metropolis

Karbala and metropolis both are nouns.

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

Karbala (noun)	metropolis (noun)
a city of central Iraq to the south of Baghdad; a holy city for Shiite Muslims because it is the site of the tomb of Mohammed's grandson who was killed there in 680	people living in a large densely populated municipality
	a large and densely populated urban area; may include several independent administrative districts