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