Fanjets are commonly known as jet engines that have a fan located at the front to draw in air and create thrust. However, there are several other terms that can be used to describe fanjets. These include turbofans, high-bypass turbofans, turbojet engines, and ducted fan engines. A turbofan engine is an advanced version of the turbojet engine, which has a high bypass ratio. High-bypass turbofan engines are the most commonly used engines for commercial aircraft. Turbojet engines, on the other hand, use a compressing air and mixing it with fuel to create thrust. Ducted fan engines utilize a fan encased in ducting, which provides additional thrust and noise reduction. Overall, the different synonyms for fanjets are used to describe the specific type of engine that powers an aircraft.