metropolis vs Tabriz

metropolis and Tabriz both are nouns.

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

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