The word "fleeter" suggests the idea of something moving quickly or swiftly. Some synonyms for this word may include "speedy," "nimble," "fast," "swift" or "fleet-footed." Other related words might include "agile," "nimble-fingered," "light-footed," or "dexterous." These words all convey a sense of movement and motion, indicating that something or someone is capable of moving quickly and easily. Whatever word you choose, the overall meaning of "fleeter" is that of something that moves with much speed and grace, conveying a sense of agility, swiftness, and nimbleness.