metropolis vs Omdurman

metropolis and Omdurman both are nouns.

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

metropolis (noun)	Omdurman (noun)
people living in a large densely populated municipality	a battle (1898) in which an English and Egyptian army under Kitchener defeated the Sudanese
a large and densely populated urban area; may include several independent administrative districts	a city of Sudan; located in the central Sudan on the White Nile opposite Khartoum