city vs Linz

city and Linz both are nouns.

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

city (noun)	Linz (noun)
people living in a large densely populated municipality	city in northern Austria on the Danube; noted as a cultural center
a large and densely populated urban area; may include several independent administrative districts
an incorporated administrative district established by state charter