The word "zippest" stands for an energetic and lively person or thing. Some of the synonyms for "zippest" include vivacious, peppy, dynamic, spirited, enthusiastic, and zestful. Other possible options are energetic, bubbly, lively, animated, vibrant, and exuberant. When describing someone who is full of life and energy, you might consider using words like high-spirited, outgoing, effervescent, lively, or bubbly. On the other hand, if you are looking to describe something that moves quickly or briskly, you might consider words like speedy, fast-paced, zippy, or brisk. Whatever word you choose, make sure it accurately captures the essence of the person or thing in question.