ADJ. fast, good, head-down, mad | steady
VERB + GALLOP break into The horses broke into a mad gallop when they heard the gunshot.
PREP. at a ~ They reached the farm at a gallop. | into a ~ The noise startled the horse into a gallop. | ~ through (figurative) The programme starts with a gallop through the history of the railway.
PHRASES at full gallop riders coming at full gallop