passport vs permission

passport and permission both are nouns.

Word	Noun	Adjective	Verb	Adverb
passport	Yes	No	No	No
permission	Yes	No	No	No

As nouns, permission is a hypernym of passport; that is, permission is a word with a broader meaning than passport:

passport (noun)	permission (noun)
any quality or characteristic that gains a person a favorable reception or acceptance or admission	the act of giving a formal (usually written) authorization
a document issued by a country to a citizen allowing that person to travel abroad and re-enter the home country	approval to do something
any authorization to pass or go somewhere