Railway engine and Steam engine

Steam engine and railway engine are semantically related in locomotive engine topic. In some cases you can use "Steam engine" instead a noun "Railway engine".

Steam engine noun - External-combustion engine in which heat is used to raise steam which either turns a turbine or forces a piston to move up and down in a cylinder.

Railway engine and steam engine are semantically related in locomotive engine topic. You can use "Railway engine" instead a noun phrase "Steam engine".