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