port of entry vs point of entry

port of entry and point of entry both are nouns.

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

As nouns, port of entry and point of entry are synonyms defined as:

port of entry and point of entry: a port in the United States where customs officials are stationed to oversee the entry and exit of people and merchandise

port of entry (noun)	point of entry (noun)
a port in the United States where customs officials are stationed to oversee the entry and exit of people and merchandise	a port in the United States where customs officials are stationed to oversee the entry and exit of people and merchandise