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