Unbearable rhymes with:
bearable, arable, bearable, marable, parable, repairable, terrible, wearable, adorable, arable, bearable, clarabelle, corabelle, curable, demonstrable, deplorable, desirable, durable, execrable, horrible, impenetrable, incurable, marable, mirabal, mirabelle, nondurable, orabelle, parable, repairable, terrible, undesirable, uninsurable, wearable
Unbearable sounds like:
unbearably, unfavorable, unfavorably, unverifiable