bit - piece of metal held in horse's mouth by reins and used to control the horse while riding; "the horse was not accustomed to a bit"

caparison, housings, trapping, trappings, housing - stable gear consisting of a decorated covering for a horse, especially (formerly) for a warhorse

cinch, girth - stable gear consisting of a band around a horse's belly that holds the saddle in place

appurtenances, paraphernalia, gear - equipment consisting of miscellaneous articles needed for a particular operation or sport etc.

hame - stable gear consisting of either of two curved supports that are attached to the collar of a draft horse and that hold the traces

harness - stable gear consisting of an arrangement of leather straps fitted to a draft animal so that it can be attached to and pull a cart

headgear - stable gear consisting of any part of a harness that fits about the horse's head

martingale - a harness strap that connects the nose piece to the girth; prevents the horse from throwing back its head

horse blanket, saddle blanket, saddlecloth - stable gear consisting of a blanket placed under the saddle

yoke - stable gear that joins two draft animals at the neck so they can work together as a team