Siege of Lucknow vs Lucknow

Siege of Lucknow and Lucknow both are nouns.

Word	Noun	Adjective	Verb	Adverb
Siege of Lucknow	Yes	No	No	No
Lucknow	Yes	No	No	No

As nouns, Siege of Lucknow and Lucknow are synonyms defined as:

Siege of Lucknow and Lucknow: the British residents of Lucknow were besieged by Indian insurgents during the Indian Mutiny (1857)

Siege of Lucknow (noun)	Lucknow (noun)
the British residents of Lucknow were besieged by Indian insurgents during the Indian Mutiny (1857)	the British residents of Lucknow were besieged by Indian insurgents during the Indian Mutiny (1857)
	a city in northern India in Uttar Pradesh; during the Indian Mutiny its British residents were besieged by Indian insurgents