A jet-propelled plane, also known as a jet or a jet plane, is a type of aircraft that uses jet engines to generate thrust. Other synonyms for this type of plane include turbojet aircraft, high-speed planes, rocket planes, and supersonic aircraft. Turbojet aircraft has been in use since the 1940s and was used extensively during the Cold War, while rocket planes are typically used for suborbital flights and research purposes. High-speed planes are commonly used for military reconnaissance, while supersonic aircraft can travel at speeds faster than the speed of sound. Regardless of the terminology, jet-propelled planes have revolutionized air travel and continue to play an essential role in modern aviation.