Here's what rhymes with castiug.
                        
                        
                    
                                drug  kg  dug  plug  bug  hug  jug  rug  tug  mug  debug  lug  pug  thug  chug  tog  trug  shrug  slug  smug  snug  unplug  ladybug  fireplug  firebug  shutterbug  hearthrug  jitterbug  mealybug  litterbug  doodlebug  Words that almost rhyme with castiug
struck  luck  truck  duck  buck  fuck  noch  pluck  suck  chuck  muck  neque  tuck  chaque  hac  puck  ruck  shuck  vac  yuk  yuck  stuck  amok  snuck  amuck  cluck  thwack  schmuck  sawbuck  upchuck  unstuck  thunderstruck