city vs Lyon

city and Lyon both are nouns.

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

city (noun)	Lyon (noun)
people living in a large densely populated municipality	a city in east-central France on the Rhone River; a principal producer of silk and rayon
a large and densely populated urban area; may include several independent administrative districts
an incorporated administrative district established by state charter