Saskatoon vs urban center

Saskatoon and urban center both are nouns.

Word	Noun	Adjective	Verb	Adverb
Saskatoon	Yes	No	No	No
urban center	Yes	No	No	No

Saskatoon (noun)	urban center (noun)
a city in central Saskatchewan; the largest city in the province	a large and densely populated urban area; may include several independent administrative districts