The term "most slowmoving" refers to something that moves at a very slow pace. One antonym for this term is "fast-paced," which means something that is quick and energetic. Another antonym could be "swift," which refers to something that moves with great speed and agility. "Rapid" is another antonym for "most slowmoving," which suggests a quick and brisk movement. "Speedy" is yet another antonym, which implies a high rate of movement. Some other antonyms for "most slowmoving" might include terms such as rapid, expeditious, prompt, brisk, zippy, or hyperactive. In general, these words all describe things that move faster than what is typically associated with most slow-moving objects or events.