urban center vs Vladivostok

urban center and Vladivostok both are nouns.

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

urban center (noun)	Vladivostok (noun)
a large and densely populated urban area; may include several independent administrative districts	a seaport in the Asian part of Russia