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