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