Here's what rhymes with pruneau.
                        
                        
                    
                                no  know  mo  uno  mow  noe  so  go  though  low  show  ago  co  snow  row  tho  fo  foe  ho  lo  plateau  bo  doe  dough  po  ro  toe  wo  woe  tow  yo  beau  ceux  faut  goe  hoe  jo  ko  propos  sew  soe  vo  beaux  cho  dau  roe  sho  yeux  zo  dunno  plateaux  rho  whoa  doh  schmo  schmoe  flow  blow  grow  slow  throw  pro  glow  quo  fro  chateau  crow  hello  thro  bio  dynamo  nouveau  aglow  aliquot  apropos  domino  floe  tuo  bro  chateaux  stow  throe  trousseau  trow  kapok  sloe  tarot  turbot  kayo  trousseaux  borzoi  romeo  resew  although  below  ratio  radio  undergo  audio  bestow  buffalo  patio  portico  calico  polio  tableau  cameo  dicho  rodeo  tableaux  topos  oregano  chapeau  oleo  piccolo  undertow  deathblow  foreknow  regrow  bandeau  gateau  matzoh  pompano  chapeaux  gateaux  pekoe  tallyho  embryo  overthrow  studio  overflow  folio  indigo  stereo  bungalow  forego  forgo  escrow  medico  outgrow  siglo  spatio  adagio  overgrow  fatso  politico  vertigo  mistletoe  presidio  afterglow  microdot  portfolio  archipelago  braggadocio  pianissimo  pistachio  mustachio  moustachio  generalissimo  impresario