The term "fanjet" refers to a type of engine that combines the features of both turbofan and turbojet engines. However, there are many synonyms that can be used to describe this type of aircraft engine, such as turbofan-turbojet, hybrid engine, mixed-flow engine, or even simply dual-engine. These terms all describe the unique design that allows for both higher thrust and fuel efficiency, making them popular in the aerospace industry. The combination of fan and jet technology has revolutionized the way aircraft engines are designed, resulting in faster, more efficient and more reliable engines for modern airliners and fighter jets alike.