port of entry vs New Orleans

port of entry and New Orleans both are nouns.

Word	Noun	Adjective	Verb	Adverb
port of entry	Yes	No	No	No
New Orleans	Yes	No	No	No

port of entry (noun)	New Orleans (noun)
a port in the United States where customs officials are stationed to oversee the entry and exit of people and merchandise	a port and largest city in Louisiana; located in southeastern Louisiana near the mouth of the Mississippi river; a major center for offshore drilling for oil in the Gulf of Mexico; jazz originated here among black musicians in the late 19th century; Mardi Gras is celebrated here each year