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