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