gallop
n. countablen. the fastest way a horse runs, where all four feet leave the ground at the same time. It can also mean moving very quickly in a way that feels like a horse running.
n. the fastest gait of a horse or other quadruped, consisting of a succession of leaping strides. By extension, refers to a rapid or hurried pace of movement or progression.
The horse broke into a fast gallop across the field.
We watched the herd of wild horses move from a slow trot into a full gallop as they reached the open plains.
The novel moves at a breakneck gallop toward its conclusion, leaving little room for the quiet character development seen in the opening chapters.
From Middle English galopen (“to gallop”), from Old French galoper (compare modern French galoper), from Frankish wala hlaupan (“to run well”), from wala (“well”) + hlaupan (“to run”), from Proto-Germanic hlaupaną (“to run, leap, spring”), from Proto-Indo-European klaup-, klaub- (“to spring, stumble”). Possibly also derived from a deverbal of Frankish walhlaup (“battle run”) from wal (“battlefield”) from a Proto-Germanic word meaning "dead, victim, slain" from Proto-Indo-European wel- (“death in battle, killed in battle”) + hlaup (“course, track”) from *hlaupan (“to run”). More at well, leap, valkyrie. See also the doublet wallop, coming from the same source through an Old Northern French variant.
Often used in the phrase 'at a gallop' to describe speed.