Odessa vs city

Odessa and city both are nouns.

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

Odessa (noun)	city (noun)
a port city of south central Ukraine on an arm of the Black Sea	people living in a large densely populated municipality
a city in western Texas	a large and densely populated urban area; may include several independent administrative districts
	an incorporated administrative district established by state charter