Here's what rhymes with immigrantion.
                        
                        
                    
                                canton  plantain  Words that almost rhyme with immigrantion
random  phantom  tantum  bantam  abandon  tandem  dampen  nonrandom  zooplankton  memorandum  phytoplankton  latin  captain  cannon  canon  grandson  mansion  ration  canyon  satin  fatten  flatten  lation  banyan  batten  chanson  clansmen  gladden  platen  clansman  klaxon  raglan  reaction  fashion  happen  passion  attraction  fraction  hadn  barren  cabin  faction  famine  wagon  chaplain  dragon  gallon  salmon  traction  baron  craftsman  fasten  caption  falcon  haben  plankton  saffron  blacken  bracken  jasmine  madmen  slacken  tation  taxon  waxen  capstan  flagon  flaxen  handgun  mammon  landsman  sadden  scansion  talon  gammon  madden  trashcan  badman  badmen  flashgun  gasman  sandmen  expansion  imagine  companion  sanction  refraction  assassin  inaction  bastion  prolactin  stallion  draftsman  draughtsman  exaction  hangman  infraction  medallion  redaction  adaption  draftsmen  batsman  refashion  unfasten  gravamen  scallion  triathlon  damson  upperclassman  bandsman  taxman  refasten  underclassman  taxmen  interaction  abstraction  compassion  contraction  extraction  battalion  diffraction  retraction  subtraction  compaction  impaction  benefaction  contraption  detraction  gyrfalcon  transaction  distraction  rarefaction  reexamine  counteraction  diapason  dispassion  overreaction  protraction  pentathlon  rapscallion  malefaction  satisfaction  liquefaction  stupefaction  petrifaction  vitrifaction  dissatisfaction  putrefaction