city vs Leiden

city and Leiden both are nouns.

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

city (noun)	Leiden (noun)
people living in a large densely populated municipality	a city in the western Netherlands; residence of the Pilgrim Fathers for 11 years before they sailed for America in 1620
a large and densely populated urban area; may include several independent administrative districts
an incorporated administrative district established by state charter