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