metropolis vs Alep

metropolis and Alep both are nouns.

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

metropolis (noun)	Alep (noun)
people living in a large densely populated municipality	a city in northwestern Syria
a large and densely populated urban area; may include several independent administrative districts