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