city vs Cadiz

city and Cadiz both are nouns.

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

city (noun)	Cadiz (noun)
people living in a large densely populated municipality	an ancient port city in southwestern Spain
a large and densely populated urban area; may include several independent administrative districts
an incorporated administrative district established by state charter