"Jump jet" is a term generally used to describe a type of aircraft that can take off vertically. This type of aircraft is also commonly known as "Vertical Takeoff and Landing" or "VTOL" jet. There are numerous synonyms for "jump jet" depending on the context in which it is used. Some common alternatives include "hovercraft," "VTOL plane," "vertical aircraft," "vertical launch aircraft," and "jet-propelled helicopter." These terms are all interchangeable and are often used in the aerospace industry to describe different types of aircraft with varying capabilities for vertical takeoff and landing. Overall, "jump jet" is just one of many ways to describe this type of aircraft.