Calgary vs city

Calgary and city both are nouns.

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

Calgary (noun)	city (noun)
the largest city in southern Alberta; an oil and gas center and a technology center for Alberta and most of western Canada	people living in a large densely populated municipality
	a large and densely populated urban area; may include several independent administrative districts
	an incorporated administrative district established by state charter