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