city vs Omdurman

city and Omdurman both are nouns.

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

city (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
an incorporated administrative district established by state charter