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