port of entry vs City of the Angels

port of entry and City of the Angels both are nouns.

Word	Noun	Adjective	Verb	Adverb
port of entry	Yes	No	No	No
City of the Angels	Yes	No	No	No

port of entry (noun)	City of the Angels (noun)
a port in the United States where customs officials are stationed to oversee the entry and exit of people and merchandise	a city in southern California; motion picture capital of the world; most populous city of California and second largest in the United States