city vs Sidon

city and Sidon both are nouns.

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

city (noun)	Sidon (noun)
people living in a large densely populated municipality	the main city of ancient Phoenicia
a large and densely populated urban area; may include several independent administrative districts
an incorporated administrative district established by state charter