The term "turbojet" refers to a type of jet engine used for aircraft propulsion. It is a specific type of engine that involves a turbine-driven compressor to force air into a combustion chamber for fuel combustion and produce a jet of hot gases that propels the aircraft forward. Some synonyms for "turbojet" include "jet engine," "turbine engine," "jet propulsion," and "turbofan." While these terms are often used interchangeably, they can also refer to different types of engines or propulsion systems. Other related terms include "rocket engine," used for spacecraft propulsion, and "ramjet," used for high-speed aircraft.