We don't have synonyms for chapelet yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are chapel, chaplet and chatelet.
(n) :
A pair of straps, with stirrups, joined at the top and fastened to the pommel or the frame of the saddle, after they have been adjusted to the convenience of the rider.
(n) :
A pair of straps, with stirrups, joined at the top and fastened to the pommel or the frame of the saddle, after they have been adjusted to the convenience of the rider.