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