The term 'move at easy gallop' can be summarized as a CANTER, which is a type of gait used by horses. CANTER is a six-letter word that describes a three-beat gait in which the horse alternates between having one foot on the ground and three feet on the ground. It is slower than a gallop but faster than a trot. The horse's head is usually held low and the stride is longer than a trot. CANTER is often used for long-distance riding and is considered to be a comfortable gait for both the horse and rider.