city vs Shiraz

city and Shiraz both are nouns.

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

city (noun)	Shiraz (noun)
people living in a large densely populated municipality	a city in central southwestern Iran; ruins of ancient Persepolis are nearby
a large and densely populated urban area; may include several independent administrative districts
an incorporated administrative district established by state charter