is a specific kind of: public transport.

is a broader term that covers: boat train | car train | freight train, rattler | hospital train | mail train | passenger train | streamliner | subway train.

has as a member: car, railcar, railroad car, railway car | engine, locomotive, locomotive engine, railway locomotive.

domain member category: roll-on roll-off | passenger, rider | standee.

derivation: rail, train.