Incurable rhymes with:
curable, curable, curable, durable, nondurable, uninsurable, adorable, arable, bearable, clarabelle, corabelle, curable, demonstrable, deplorable, desirable, durable, execrable, horrible, impenetrable, marable, mirabal, mirabelle, nondurable, orabelle, parable, repairable, terrible, unbearable, undesirable, uninsurable, wearable
Incurable sounds like:
immeasurable, immeasurably, inexorable, inexorably