city vs Grozny

city and Grozny both are nouns.

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

city (noun)	Grozny (noun)
people living in a large densely populated municipality	the capital of Chechnya in southwestern Russia; center of extensive oil fields
a large and densely populated urban area; may include several independent administrative districts
an incorporated administrative district established by state charter