CAPARISON is validvalid

to decorate a horse with finery [v CAPARISONED, CAPARISONING, CAPARISONS]

92,896 of 196,601 in NWL2023·also valid in CSW24

an ornamented covering for a horse, esp. a warhorse [n -S] / to adorn a horse [v -ED, -ING, -S]