city vs Las Vegas

city and Las Vegas both are nouns.

Word	Noun	Adjective	Verb	Adverb
city	Yes	No	No	No
Las Vegas	Yes	No	No	No

city (noun)	Las Vegas (noun)
people living in a large densely populated municipality	largest city in Nevada; located in southeastern Nevada; originally settled by Mormons but is now famous for entertainment and gambling and general excess
a large and densely populated urban area; may include several independent administrative districts
an incorporated administrative district established by state charter