The word "crawliest" implies movement on all fours, indicating something that moves slowly and awkwardly. Antonyms for "crawliest" includes "flying," "bouncing," "skipping," "hopping," "galloping," and "swimming." These words convey swiftness, gracefulness, and energy, which are the opposite of the slow, lumbering movement associated with "crawliest." Along with these words, other antonyms for "crawliest" can be "sprinting," "darting," "flickering," and "whizzing," which all suggest movement that is quick, agile, and light-footed.