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