Here's what rhymes with irresolute.
                        
                        
                    
                                root  route  ut  salute  solute  loot  lute  acute  fruit  suit  shoot  boot  brute  mute  resolute  cute  flute  peut  refute  chute  dissolute  doit  fuit  jute  moot  bruit  hoot  nuit  pollute  uproot  toot  butte  coot  hirsute  newt  volute  galoot  bluet  absolute  dispute  pursuit  dilute  recruit  astute  commute  impute  doute  overshoot  cheroot  reboot  scoot  reroute  taproot  permute  snoot  cahoot  execute  compute  institute  prosecute  repute  persecute  subacute  lnstitute  arrowroot  confute  depute  beetroot  gumboot  attribute  destitute  prostitute  parachute  disrepute  transmute  recompute  undershoot  tracksuit  jackboot  malamute  constitute  substitute  electrocute  bodysuit  telecommute  reconstitute  Words that almost rhyme with irresolute
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