metropolis vs Lucknow

metropolis and Lucknow both are nouns.

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

metropolis (noun)	Lucknow (noun)
people living in a large densely populated municipality	the British residents of Lucknow were besieged by Indian insurgents during the Indian Mutiny (1857)
a large and densely populated urban area; may include several independent administrative districts	a city in northern India in Uttar Pradesh; during the Indian Mutiny its British residents were besieged by Indian insurgents