Here's what rhymes with withiu.
                        
                        
                    
                                who  shoe  zu  shew  su  sue  vous  fu  zoo  hu  seu  shu  sou  vu  feu  shou  thu  vou  shoo  thew  to  you  do  two  new  through  too  few  view  due  knew  du  u  threw  coup  flew  qu  dew  hue  lieu  tu  chew  deux  ensue  flue  lu  rue  slew  stew  bu  flu  ju  jus  ku  loo  mu  nu  peu  pu  thru  woo  yew  yu  boo  chou  chu  coo  cou  doo  eschew  ewe  fue  gu  hew  ru  shrew  tue  tzu  vue  wou  wu  goo  moo  pooh  poo  gnu  roux  slue  whew  phew  wazoo  into  true  blue  drew  grew  que  crew  pursue  blew  q  screw  withdrew  anew  clue  cue  glue  queue  renew  cu  adieu  ado  brew  pew  skew  mieux  revue  sprue  vnto  clew  mew  strew  halloo  spew  valuer  zebu  kazoo  achoo  atishoo  review  hitherto  avenue  canoe  undue  accrue  subdue  taboo  undo  jusqu  overdue  piu  tattoo  beaucoup  outdo  shampoo  sinew  askew  imbue  overdo  redo  endue  foreknew  indue  bestrew  overshoe  prevue  booboo  interview  revenue  overview  residue  bamboo  debut  rendezvous  untrue  caribou  overthrew  outgrew  ballyhoo  honeydew  fondue  muumuu  overflew  overdrew  overgrew  regrew  retinue  construe  kangaroo  cockatoo  bugaboo  marabou  peekaboo  buckaroo  superglue  barbecue  hullabaloo  barbeque  misconstrue