Here's what rhymes with petroleun.
                        
                        
                    
                                loon  rune  soon  moon  noon  tune  boon  hewn  shewn  doin  dune  foon  aucune  coon  prune  croon  goon  shoon  immune  balloon  spoon  lagoon  saloon  strewn  toluene  maroon  raccoon  swoon  attune  poltroon  racoon  cartoon  platoon  cocoon  baboon  buffoon  harpoon  typhoon  bassoon  dragoon  impugn  tycoon  jejune  lampoon  doubloon  patroon  picayune  protozoon  bestrewn  monsoon  forenoon  opportune  pontoon  festoon  spittoon  macaroon  afternoon  honeymoon  tablespoon  importune  inopportune  spermatozoon  trinitrotoluene  dessertspoon  Words that almost rhyme with petroleun
room  loom  rheum  whom  boom  tomb  bloom  doom  gloom  womb  broom  groom  plume  zoom  fume  flume  assume  resume  suum  abloom  legroom  perfume  presume  elbowroom  entomb  strongroom  boxroom  foredoom  costume  consume  residuum  subsume  exhume