urban center vs Tammerfors

urban center and Tammerfors both are nouns.

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

urban center (noun)	Tammerfors (noun)
a large and densely populated urban area; may include several independent administrative districts	an industrial city in south central Finland