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