Here's what rhymes with formalisation.
                        
                        
                    
                                nation  station  cessation  normalization  aeration  elation  harmonization  relation  location  cultivation  elevation  inflation  innovation  liberation  organisation  rotation  salvation  sensation  fixation  irritation  vacation  aviation  causation  narration  realisation  socialization  vocation  citation  gestation  innervation  iteration  oration  sedation  summation  ulceration  utilisation  alleviation  amortization  deflation  laceration  information  operation  organization  situation  creation  formation  association  civilization  duration  foundation  publication  radiation  separation  variation  appreciation  deviation  formulation  inspiration  invitation  isolation  limitation  motivation  realization  restoration  revelation  taxation  violation  allocation  alteration  aspiration  dissertation  imitation  initiation  irrigation  notation  reservation  respiration  saturation  temptation  utilization  valuation  vibration  accusation  affiliation  affirmation  annexation  civilisation  colonization  derivation  dissipation  evaporation  federation  generalization  globalization  insulation  ionization  litigation  localization  mobilization  mutation  negation  oscillation  probation  reformation  starvation  veneration  abbreviation  aberration  adoration  allegation  bifurcation  divination  donation  fertilization  hydration  inhalation  invocation  ornamentation  perforation  rationalization  recitation  renovation  reparation  revocation  usurpation  visitation  education  application  generation  corporation  evaluation  legislation  observation  occupation  participation  preparation  regulation  reputation  translation  activation  admiration  correlation  illustration  immigration  indication  migration  obligation  orientation  preservation  agitation  alienation  anticipation  arbitration  assimilation  collaboration  decoration  delegation  elimination  estimation  excitation  frustration  hesitation  implication  inclination  inflammation  installation  manifestation  medication  meditation  navigation  negotiation  nomination  oxidation  plantation  proliferation  quotation  recreation  registration  relaxation  resignation  termination  vegetation  aggregation  animation  annihilation  approbation  assassination  authorization  deliberation  deprivation  desolation  desperation  dilatation  dislocation  dissociation  distillation  elaboration  emigration  exaggeration  expiration  fabrication  fascination  filtration  graduation  habitation  incubation  irradiation  liberalization  maturation  mediation  moderation  modernization  modulation  optimization  ordination  polarization  replication  retardation  specialization  stabilization  toleration  unification  validation  affectation  alternation  amputation  appellation  automation  castration  centralization  coronation  culmination  damnation  delineation  demarcation  elongation  elucidation  emulation  enumeration  escalation  exaltation  fibrillation  gravitation  imputation  inactivation  intimation  intonation  liquidation  ovulation  perspiration  polymerization  provocation  reclamation  refrigeration  refutation  relocation  renunciation  resuscitation  sanitation  stagnation  standardization  sterilization  urbanization  visualization  population  consideration  examination  interpretation  circulation  conversation  cooperation  imagination  integration  presentation  adaptation  compensation  conservation  declaration  exploration  modification  stimulation  acceleration  accommodation  appropriation  approximation  celebration  computation  confirmation  congregation  consultation  deformation  degeneration  degradation  depreciation  designation  destination  domination  emancipation  illumination  incorporation  indignation  manipulation  penetration  precipitation  proclamation  propagation  regeneration  segregation  simulation  ventilation  amplification  articulation  attenuation  calibration  complication  condensation  consolation  dedication  dissemination  evacuation  excavation  fermentation  humiliation  importation  incarnation  infiltration  notification  privatization  pronunciation  ratification  remuneration  reorganization  retaliation  signification  sophistication  verification  adjudication  amalgamation  argumentation  augmentation  cancellation  capitalization  capitulation  categorization  commendation  conciliation  conformation  connotation  consummation  crystallization  dehydration  denunciation  deputation  devaluation  devastation  dispensation  duplication  eradication  exhortation  exportation  fluctuation  germination  hospitalization  hybridization  immunization  implantation  inauguration  inoculation  interpolation  interrogation  intimidation  magnetization  masturbation  mortification  nationalization  perturbation  prolongation  punctuation  repudiation  segmentation  subjugation  vaccination  vindication  administration  combination  communication  concentration  explanation  classification  determination  investigation  representation  transformation  accumulation  calculation  configuration  demonstration  differentiation  expectation  exploitation  implementation  justification  transportation  characterization  condemnation  confrontation  consolidation  contemplation  continuation  coordination  deterioration  documentation  qualification  recommendation  reconciliation  rehabilitation  specification  speculation  certification  clarification  coagulation  compilation  denomination  fragmentation  gratification  industrialization  intoxication  multiplication  preoccupation  purification  stratification  subordination  authentication  calcification  confederation  confiscation  conflagration  consecration  constellation  consternation  constipation  decentralization  deportation  deregulation  exclamation  extermination  magnification  menstruation  personification  regurgitation  sedimentation  simplification  stipulation  supplementation  synchronization  identification  discrimination  contamination  disintegration  transplantation  conceptualization  democratization  instrumentation  quantification  experimentation  diversification  intensification  misrepresentation  excommunication  Words that almost rhyme with formalisation
haven  hasten  evasion  invasion  basin  equation  occasion  persuasion  shaken  shaman  taken  pagan  bacon  laden  maiden  layman  laymen  mistaken  patron  awaken  salesman  straighten  statesman  forsaken  overtaken  undertaken  contagion  tradesmen