urban center vs Strassburg

urban center and Strassburg both are nouns.

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

urban center (noun)	Strassburg (noun)
a large and densely populated urban area; may include several independent administrative districts	city on the Rhine in eastern France near the German border; an inland port