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