mail carrier

carrier, porter, bearer, tranter, conveyer; cargador; express, expressman; stevedore, coolie; conductor, locomotive, motor., beast, beast of burden, cattle, horse, nag, palfrey, Arab, blood horse, throughbred, galloway, charger, courser, racer, hunter, jument, pony, filly, colt, foal, barb, roan, jade, hack, bidet, pad, cob, tit, punch, roadster, goer; racehorse, pack horse, draft horse, cart horse, dray horse, post horse; ketch, sheltie; garran, garron; jennet, genet, bayard, marek, stallion, gelding; bronco, broncho, cayuse [U.S.]; creature, critter [rural U.S.]; cow pony, mustang, Narraganset, waler; stud., Pegasus, Bucephalus, Rocinante., ass, donkey, jackass, mule, hinny; sumpter horse, sumpter mule; burro, cuddy, ladino [U.S.]; reindeer; camel, dromedary, llama, elephant; carrier pigeon., carriage (vehicle); ship.

equine, asinine.