Here's what rhymes with couiil.
                        
                        
                    
                                wheal  thiol  phial  authorial  labial  pineal  gonorrheal  notarial  bilabial  estradiol  Words that almost rhyme with couiil
evil  eagle  easel  weasel  weevil  wheedle  people  equal  legal  needle  renal  feeble  fetal  lethal  penal  beetle  diesel  fecal  regal  siecle  phenyl  venal  beadle  gleeful  beagle  seagull  decal  riyal  teasel  resole  teazel  illegal  peaceful  genial  needful  sequel  feveral  steeple  varietal  coequal  heedful  respell  medieval  cathedral  unequal  adrenal  upheaval  lacrimal  requital  canticle  enfeeble  laypeople  retrieval  congenial  duodenal  primeval  deceitful  inositol  inveigle  nonlegal  nonlethal  octahedral  paralegal  uncongenial  extralegal  polyhedral  centripetal  tetrahedral