Here's what rhymes with aphthous.
                        
                        
                    
                                vows  hows  thous  cows  arouse  bows  boughs  avows  dhows  scows  cowers  mows  wows  chows  loughs  taus  allows  brows  browse  espouse  ploughs  plows  carouse  prows  drowse  haymows  endows  disavows  hedgerows  snowploughs  menopause  windrows  cornrows  prognathous  Words that almost rhyme with aphthous
house  south  mouth  mouse  spouse  rouse  louse  douse  louche  dowse  pouffe  blouse  grouse  drouth  firehouse  coffeehouse  powerhouse  boathouse  summerhouse  slaughterhouse  packinghouse  meetinghouse  cottonmouth  porterhouse  boardinghouse  clearinghouse  fowls  howls  fouls  sourdoughs  sounds  towns  mouths  nouns  downs  gowns  hounds  founds  frowns  shrouds  jowls  scowls  bauds  cowls  dowers  yowls  zounds  pounds  clouds  bounds  crowds  crowns  mounds  rounds  surrounds  clowns  lbs  browns  drowns  growls  prowls  befouls  grounds  abounds  southwards  resounds  astounds  enshrouds  newshounds  confounds  expounds  nightgowns  redounds  beclouds  eiderdowns  impounds  inbounds  wolfhounds  ballgowns  overclouds  rubdowns  waterfowls  overcrowds  dumfounds  wildfowls  foregrounds  propounds  shantytowns  turnarounds  ultrasounds  runarounds  wraparounds  thunderclouds  battlegrounds