Omdurman vs battle of Omdurman

Omdurman and battle of Omdurman both are nouns.

Word	Noun	Adjective	Verb	Adverb
Omdurman	Yes	No	No	No
battle of Omdurman	Yes	No	No	No

As nouns, Omdurman and battle of Omdurman are synonyms defined as:

Omdurman and battle of Omdurman: a battle (1898) in which an English and Egyptian army under Kitchener defeated the Sudanese

Omdurman (noun)	battle of Omdurman (noun)
a battle (1898) in which an English and Egyptian army under Kitchener defeated the Sudanese	a battle (1898) in which an English and Egyptian army under Kitchener defeated the Sudanese
a city of Sudan; located in the central Sudan on the White Nile opposite Khartoum