Tientsin vs urban center

Tientsin and urban center both are nouns.

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

Tientsin (noun)	urban center (noun)
a major industrial center in northeastern China on the Grand Canal near the Yellow Sea; 3rd largest city in China	a large and densely populated urban area; may include several independent administrative districts