city vs Sardis

city and Sardis both are nouns.

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

city (noun)	Sardis (noun)
people living in a large densely populated municipality	an ancient Greek city located in the western part of what is now modern Turkey; as the capital of Lydia it was the cultural center of Asia Minor; destroyed by Tamerlane in 1402
a large and densely populated urban area; may include several independent administrative districts
an incorporated administrative district established by state charter