Jet engine and Rocket engine

Jet engine noun - A gas turbine produces a stream of hot gas that propels a jet plane by reaction propulsion.

Rocket engine and jet engine are semantically related. In some cases you can replace phrase "Rocket engine" with "Jet engine", this phrases are similar.

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

Jet engine and rocket engine are semantically related. You can use "Jet engine" instead a noun phrase "Rocket engine".