Freight car and Railway car

Freight car noun - A railway car that carries freight.

Railway car and freight car are semantically related in railcar topic. In some cases you can use "Railway car" instead a noun phrase "Freight car", when it comes to topics like railroad car.

Railway car noun - A wheeled vehicle adapted to the rails of railroad.

Freight car and railway car are semantically related in railcar topic. You can use "Freight car" instead a noun phrase "Railway car", if it concerns topics such as railroad car.