Here's what rhymes with undecyl.
                        
                        
                    
                                Words that almost rhyme with undecyl
deal  peel  peal  teal  feel  real  ideal  appeal  steel  meal  seal  wheel  zeal  steal  heal  heel  unreal  keel  kneel  reel  veal  weel  anneal  congeal  spiel  unseal  unreel  conceal  ordeal  repeal  genteel  famille  ileal  luteal  surreal  creel  tumbril  misdeal  reveal  automobile  gluteal  peroneal  puerile  squeal  fibril  reseal  schlemiel  corneal  popliteal  snowmobile  bookmobile  audiophile  shlemiel  bloodmobile  epiphyseal  glockenspiel  peritoneal  periosteal  bibliophile  intraperitoneal  retroperitoneal