Rocket engine and Rocket motor

Rocket engine noun - A jet engine containing its own propellant and driven by reaction propulsion.

Rocket motor and rocket engine are semantically related. in jet engine with reaction propulsion topic. In some cases you can use "Rocket motor" instead a noun phrase "Rocket engine".

Rocket engine and rocket motor are semantically related. Sometimes you can replace phrase "Rocket engine" with "Rocket motor", this phrases are similar.