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