The term 'RUNS AT FULL SPEED' can be summarized as 'SPRINTS', which is a 7-letter word. Sprinting is a form of running in which the runner attempts to cover a short distance in the shortest possible time. It is a type of high-intensity exercise that requires the runner to move at their maximum speed for a short period of time. Sprinting is often used in competitive sports such as track and field, as well as in physical fitness training.