metropolis vs Seyhan

metropolis and Seyhan both are nouns.

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

metropolis (noun)	Seyhan (noun)
people living in a large densely populated municipality	a city in southern Turkey on the Seyhan River
a large and densely populated urban area; may include several independent administrative districts	a Turkish river flowing south southwest into the Mediterranean