port of entry vs Seattle

port of entry and Seattle both are nouns.

Word	Noun	Adjective	Verb	Adverb
port of entry	Yes	No	No	No
Seattle	Yes	No	No	No

port of entry (noun)	Seattle (noun)
a port in the United States where customs officials are stationed to oversee the entry and exit of people and merchandise	a major port of entry and the largest city in Washington; located in west central Washington on the protected waters of Puget Sound with the snow-capped peaks of the Cascade Range and Mount Rainier visible to the south and east; an aerospace and computer center; site of the University of Washington