metropolis vs Al Mukalla

metropolis and Al Mukalla both are nouns.

Word	Noun	Adjective	Verb	Adverb
metropolis	Yes	No	No	No
Al Mukalla	Yes	No	No	No

metropolis (noun)	Al Mukalla (noun)
people living in a large densely populated municipality	a port in southern Yemen on the Gulf of Aden to the east of Aden
a large and densely populated urban area; may include several independent administrative districts