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