transportation has 13 distinct synonyms spread across 6 of its 6 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.
a facility consisting of the means and equipment necessary for the movement of passengers or goods
the act of moving something from one location to another
the United States federal department that institutes and coordinates national transportation programs; created in 1966
the commercial enterprise of moving goods and materials
the act of expelling a person from their native land
“men in exile dream of hope”
Synonyms, antonyms and the broader and narrower relations for transportation come from Princeton University’s WordNet. Full sources and licences.