metropolis vs Constantine

metropolis and Constantine both are nouns.

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

metropolis (noun)	Constantine (noun)
people living in a large densely populated municipality	a walled city in northeastern Algeria to the east of Algiers; was destroyed in warfare in the 4th century and rebuilt by Constantine I
a large and densely populated urban area; may include several independent administrative districts	Emperor of Rome who stopped the persecution of Christians and in 324 made Christianity the official religion of the Roman Empire; in 330 he moved his capital from Rome to Byzantium and renamed it Constantinople (280-337)