Here's what rhymes with gakuin.
                        
                        
                    
                                ruin  neuen  Words that almost rhyme with gakuin
lumen  loosen  gluten  rumen  cumin  crewman  newton  lupin  human  union  fusion  illusion  proven  allusion  occlusion  collusion  acumen  elution  illumine  mucin  soupcon  solution  conclusion  exclusion  pollution  inclusion  delusion  dilution  effusion  reunion  seclusion  bitumen  contusion  ablution  locution  groomsmen  unloosen  confusion  evolution  execution  diffusion  communion  infusion  persecution  albumin  intrusion  perfusion  inhuman  absolution  convolution  extrusion  nonhuman  elocution  nonunion  unproven  malocclusion  suffusion  obtrusion  preclusion  constitution  resolution  revolution  dissolution  prosecution  diminution  attribution  profusion  devolution  disunion  protrusion  disillusion  involution  subhuman  contribution  institution  substitution  prostitution  restitution  superhuman  destitution  reperfusion  irresolution  lilliputian  retribution  transfusion  reconstitution  circumlocution  electrocution  antipollution  distribution  counterrevolution  redistribution