Locomotive engine and Steam engine

Locomotive engine noun - A wheeled vehicle consisting of a self-propelled engine that is used to draw trains along railway tracks.

Steam engine and locomotive engine are semantically related. In some cases you can use "Steam engine" instead a noun phrase "Locomotive 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.

Locomotive engine and steam engine are semantically related. You can use "Locomotive engine" instead a noun phrase "Steam engine".