Tulsa vs city

Tulsa and city both are nouns.

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

Tulsa (noun)	city (noun)
a major city of northeastern Oklahoma on the Arkansas river; once known as the oil capital of the world and still heavily involved in the oil and gas industries	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