Here's what rhymes with ameliorism.
                        
                        
                    
                                prism  schism  aphorism  chrism  purism  sophism  organism  socialism  optimism  pluralism  terrorism  barbarism  dualism  modernism  rheumatism  egoism  egotism  militarism  nihilism  anarchism  animism  chauvinism  elitism  euphemism  holism  legalism  lyricism  mannerism  pauperism  plagiarism  stoicism  archaism  racialism  futurism  tokenism  tropism  mechanism  communism  heroism  journalism  liberalism  altruism  dynamism  feudalism  formalism  humanism  pessimism  unionism  anachronism  catechism  dogmatism  eroticism  fatalism  narcissism  paganism  aneurism  exorcism  hedonism  nepotism  ostracism  populism  shamanism  albinism  automatism  botulism  isomerism  mesmerism  neutralism  solipsism  synergism  monetarism  mongolism  solecism  criticism  metabolism  imperialism  nationalism  patriotism  alcoholism  antagonism  colonialism  despotism  feminism  materialism  mysticism  symbolism  activism  cynicism  embolism  empiricism  federalism  magnetism  naturalism  parallelism  positivism  pragmatism  radicalism  rationalism  relativism  classicism  consumerism  pacifism  regionalism  secularism  separatism  corporatism  favoritism  fetishism  heathenism  hypnotism  revisionism  voluntarism  clericalism  cretinism  ecumenism  favouritism  impressionism  parochialism  proselytism  puritanism  revivalism  witticism  adventurism  agrarianism  anabolism  charlatanism  creationism  capitalism  conservatism  determinism  fanaticism  romanticism  scepticism  absolutism  cannibalism  evangelism  paternalism  agnosticism  astigmatism  behaviorism  centralism  commercialism  eclecticism  emotionalism  functionalism  isolationism  mercantilism  microorganism  monasticism  parasitism  recidivism  abolitionism  exoticism  gradualism  negativism  skepticism  authoritarianism  bilingualism  collectivism  industrialism  postmodernism  protectionism  republicanism  antisemitism  egalitarianism  factionalism  provincialism  scholasticism  sectarianism  anticommunism  evangelicalism  expressionism  perfectionism  sectionalism  syndicalism  individualism  professionalism  fundamentalism  hyperthyroidism  hypothyroidism  internationalism  expansionism  intellectualism  sensationalism  traditionalism  exhibitionism  interventionism  somnambulism  totalitarianism  utilitarianism  cosmopolitanism  sentimentalism  environmentalism  existentialism  humanitarianism  electromagnetism  transcendentalism  constitutionalism  Words that almost rhyme with ameliorism
arisen  rhythm  risen  logarithm  mizzen  given  addition  vision  edition  listen  mission  prison  algorithm  derision  fission  audition  riven  position  opposition  commission  driven  permission  physician  admission  ambition  petition  coalition  collision  emission  prohibition  revision  forgiven  omission  remission  apparition  attrition  magician  logician  rhetorician  stiffen  glisten  rescission  condition  decision  division  tradition  provision  precision  proposition  repetition  suspicion  abolition  cognition  incision  partition  politician  submission  clinician  excision  ignition  musician  tuition  erudition  fruition  sedition  volition  apposition  envision  imprison  patrician  rendition  striven  dietitian  munition  prevision  readmission  tactician  definition  competition  composition  recognition  television  transition  acquisition  supervision  ammunition  deposition  exhibition  inhibition  intuition  nutrition  imposition  supposition  admonition  demolition  preposition  requisition  technician  contrition  dentition  intermission  paroxysm  cataclysm  premonition  theoretician  ebullition  transmission  disposition  expedition  exposition  superstition  circumcision  malnutrition  mathematician  indecision  inquisition  interposition  precondition  redefinition  electrician  manumission  obstetrician  academician  imprecision  subdivision  extradition  indisposition  presupposition  superposition  disquisition  pediatrician  statistician  decomposition  juxtaposition  predisposition  transposition  diagnostician  superimposition  wisdom  serum  theorem  cecum  gingham  system  kingdom  victim  dictum  gypsum  fearsome  winsome  symptom  pilgrim  ecosystem