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