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