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Synonyms for Car (same or very similar meaning)

WordNet sense 1 (the compartment that is suspended from an airship and that carries personnel and the cargo and the power plant):

WordNet sense 2 (where passengers ride up and down):
elevator car

WordNet sense 3 (a wheeled vehicle adapted to the rails of railroad):
railcar, railroad car, railway car

WordNet sense 4 (a motor vehicle with four wheels; usually propelled by an internal combustion engine):
auto, automobile, machine, motorcar

WordNet sense 5 (a conveyance for passengers or freight on a cable railway):
cable car

From the ODE community, based on WordNetadd/edit