Here's what rhymes with polyurethane.
                        
                        
                    
                                vain  vein  sane  fain  vane  feign  thane  main  gain  pain  chain  rain  reign  attain  ln  cane  slain  stain  lane  lain  pane  rein  bane  mane  tain  wane  deign  skein  urbane  swain  urethane  arraign  wain  brain  obtain  remain  grain  plain  plane  strain  train  retain  sustain  drain  insane  refrain  profane  regain  terrain  abstain  crane  pertain  twain  arcane  cellophane  certaine  germane  inane  moraine  overlain  romaine  sprain  chicane  murrain  reattain  contain  campaign  domain  ascertain  champagne  cocaine  disdain  humane  restrain  aeroplane  detain  hurricane  mundane  ordain  sugarcane  butane  halothane  humaine  appertain  retrain  wholegrain  explain  maintain  complain  entertain  constrain  coxswain  ingrain  foreordain  preordain  inhumane  monoplane  legerdemain  reexplain  windowpane  hydroplane  demimondaine  Words that almost rhyme with polyurethane
same  fame  shame  came  name  game  frame  flame  lame  tame  dame  aflame  maim  claim  blame  overcame  acclaim  rename  defame  became  reclaim  inflame  selfsame  forename  proclaim  exclaim  filename  disclaim  declaim  aspartame  ballgame  quitclaim  counterclaim