Memel vs urban center

Memel and urban center both are nouns.

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

Memel (noun)	urban center (noun)
a city in western Lithuania on the Baltic Sea; formerly an important trading town of the Hanseatic League	a large and densely populated urban area; may include several independent administrative districts