Here's what rhymes with diarrhoaal.
whole role soul coal goal hole pole roll sole bowl fol mole poll toll parole knoll shoal dole foal bole boll thole vole kohl tole dolour stole droll cajole troll unroll prole skoal patrol scroll stroll enroll systole casserole petiole bedroll condole oriole maypole rissole innersole control glycerol extol vacuole buttonhole pigeonhole camisole cubbyhole extoll beanpole arteriole decontrol profiterole quadrupole