city vs Jiddah

city and Jiddah both are nouns.

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

city (noun)	Jiddah (noun)
people living in a large densely populated municipality	port city in western Saudi Arabia on the Red Sea; near Mecca
a large and densely populated urban area; may include several independent administrative districts
an incorporated administrative district established by state charter