city vs Mashhad

city and Mashhad both are nouns.

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

city (noun)	Mashhad (noun)
people living in a large densely populated municipality	the holy city of Shiite Muslims; located in northeastern Iran
a large and densely populated urban area; may include several independent administrative districts
an incorporated administrative district established by state charter