urban center vs Argos

urban center and Argos both are nouns.

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

urban center (noun)	Argos (noun)
a large and densely populated urban area; may include several independent administrative districts	an ancient city in southeastern Greece; dominated the Peloponnese in the 7th century BC