There are several synonyms for the word "one who sprints" depending on the context of the sentence and the level of intensity with which the individual sprints. Some common options include "sprinter," "dash runner," "speedster," and "fast-runner." If the person is an athlete specifically competing in sprinting events, they may also be called a "track star" or simply an "elite sprinter." Alternately, if the person is simply running at a faster pace than those around them, they may be referred to as a "quick runner," "fleet-footed," or even a "bolt" in reference to the fastest sprinter of all time, Usain Bolt.