Horse's Run is a term used to describe the different gaits of a horse. LOPE is a four-letter word that describes a slow, relaxed gait of a horse, where the horse moves its legs in diagonal pairs. GALLOP is a six-letter word that describes a faster gait of a horse, where the horse moves its legs in a sequence of diagonal pairs and single legs. Both LOPE and GALLOP are common gaits of a horse and are used for different purposes.