Railroad car

A wheeled vehicle designed to carry passengers or freight on a railway. Cars are coupled into trains and move on rails rather than under their own road wheels.

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Railway bogie: A wheeled frame beneath a rail vehicle that supports it and guides it through curves. Bogie-mounted wheels let long cars negotiate curves while distributing their weight.
Passenger car (rail): A railway car designed to carry people, with seating or sleeping accommodation and passenger access. It is the principal car type for transporting passengers.
Locomotive: A rail vehicle that supplies the power to move a train, usually by pulling or pushing other vehicles. Unlike an ordinary car, it provides the train’s traction.
Intermodal freight transport: The movement of freight in standardized loading units across multiple transport modes without handling the goods themselves. Container-ready cars connect rail freight with ships and trucks.
Railway coupling: A device or system that joins railway vehicles and transmits forces between them. Couplings connect cars into trains and carry pulling and braking forces.
Freight car: A railway vehicle designed to carry goods rather than passengers. Freight cars are specialized for particular cargoes and loading methods.
Railcar: A powered railway vehicle that can carry passengers or freight without a separate locomotive. Its onboard propulsion distinguishes it from the usual unpowered car.
Railroad car float: A barge designed to carry railway cars across water where no rail bridge or tunnel exists. Car floats extend rail service across waterways by carrying entire cars.
Railway wheel: A steel wheel shaped to run on rails, commonly with a flange that helps keep it aligned. Its tread and flange guide the car along the track.
Boxcar: An enclosed freight car used to carry goods protected from weather and theft. Its enclosed body suits packaged freight that needs protection.