CHAMOIS is validvalid

a soft leather [n CHAMOIX] / to buff with soft leather [v CHAMOISED, CHAMOISES, CHAMOISING]

35,417 of 196,601 in NWL2023·also valid in CSW24

(French) a soft leather, also CHAMOIX, SHAMMY [n CHAMOISES or CHAMOIS] / to prepare leather like chamois, also SHAMMY [v -ED, -ING, -ES]