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