Here's what rhymes with impostum.
                        
                        
                    
                                dem  dumb  bum  dum  tum  chum  tem  sebum  spume  from  some  come  sum  cum  drum  thumb  comme  gum  rum  hum  plum  slum  zum  comm  mum  même  num  numb  plumb  scum  sm  trom  swum  strum  thrum  yum  become  overcome  succumb  crumb  glum  scrum  benumb  sacrum  frustum  cerebrum  breadcrumb  candelabrum  simulacrum  Words that almost rhyme with impostum
done  tongue  tion  ton  spun  dung  stung  bun  donne  dun  pun  tung  bn  jun  tonne  tun  bung  stun  one  young  run  son  none  sun  won  gun  fun  hung  lung  flung  sung  swung  nun  sprung  rung  shun  sion  slung  strung  wrung  fon  rien  cen  fron  gon  hun  kung  overdone  seisin  spline  ven  yean  toucan  naan  among  begun  clung  overrun  undone  outdone  outrun  overhung  redone  misdone  rerun  unsung  cretonne  rehung  anyone  everyone  twentyone