metropolis vs Ilium

metropolis and Ilium both are nouns.

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

metropolis (noun)	Ilium (noun)
people living in a large densely populated municipality	an ancient city in Asia Minor that was the site of the Trojan War
a large and densely populated urban area; may include several independent administrative districts