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