passport has 2 distinct synonyms spread across 2 of its 3 senses. Each sense below keeps its own list, because a synonym belongs to a meaning and not to a word: swapping one sense's substitute into another sense's sentence is how a thesaurus makes writing worse. WordNet records no antonym for it — antonymy is a relation between word forms rather than concepts, so it is deliberately sparse.
Counts are distinct word forms across every sense. A synonym that appears under three senses is counted once here and shown three times below, under each sense it belongs to.
any authorization to pass or go somewhere
“the pass to visit had a strict time limit”
a document issued by a country to a citizen allowing that person to travel abroad and re-enter the home country
Synonyms, antonyms and the broader and narrower relations for passport come from Princeton University’s WordNet. Full sources and licences.
any quality or characteristic that gains a person a favorable reception or acceptance or admission
“her pleasant personality is already a recommendation”