A turbojet engine is a type of gas turbine engine that is commonly used in aircraft propulsion. However, there are several other words and phrases that can be used to describe this type of engine. One possible synonym is a jet engine, which is a more general term that can also refer to other types of gas turbine engines. Another possible synonym is a axial flow engine, which refers specifically to the design of the engine's compressor and turbine sections. Finally, some people may refer to a turbojet engine as a pulse jet engine, which is a related type of engine that uses intermittent combustion to generate thrust.