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