city vs Troy

city and Troy both are nouns.

Word	Noun	Adjective	Verb	Adverb
city	Yes	No	No	No
Troy	Yes	No	No	No

city (noun)	Troy (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
an incorporated administrative district established by state charter