Here's what rhymes with copulation.
                        
                        
                    
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sterilization  utilisation  visitation  organization  communication  examination  interpretation  civilization  classification  determination  evaluation  participation  transformation  demonstration  expectation  inspiration  invitation  justification  organisation  orientation  transportation  anticipation  approximation  consolidation  contamination  continuation  degeneration  depreciation  deterioration  emancipation  excitation  incorporation  indignation  initiation  qualification  regeneration  registration  assassination  civilisation  clarification  denomination  dissemination  dissociation  evaporation  exaggeration  excavation  expiration  fermentation  generalization  globalization  humiliation  importation  incarnation  incubation  infiltration  liberalization  multiplication  notification  preoccupation  privatization  pronunciation  purification  remuneration  socialization  specialization  stabilization  subordination  unification  verification  amalgamation  augmentation  authentication  calcification  centralization  conciliation  crystallization  denunciation  devaluation  dispensation  enumeration  exaltation  exhortation  exportation  extermination  gravitation  hybridization  immunization  inauguration  liquidation  mortification  normalization  polymerization  punctuation  quantification  refrigeration  renunciation  repudiation  resuscitation  supplementation  vaccination  vindication  consideration  representation  configuration  differentiation  discrimination  implementation  documentation  negotiation  precipitation  recommendation  reconciliation  rehabilitation  disintegration  fragmentation  intoxication  signification  stratification  transplantation  argumentation  confederation  hospitalization  inactivation  intimidation  magnetization  magnification  menstruation  nationalization  ornamentation  rationalization  sedimentation  segmentation  simplification  visualization  administration  identification  investigation  characterization  manifestation  specification  experimentation  industrialization  reorganization  sophistication  decentralization  democratization  diversification  instrumentation  personification  standardization  synchronization  conceptualization  excommunication  intensification  misrepresentation  Words that almost rhyme with copulation
occasion  haven  basin  hasten  evasion  equation  invasion  persuasion  laden  layman  laymen  taken  pagan  shaken  awaken  bacon  maiden  shaman  patron  straighten  undertaken  salesman  contagion  forsaken  overtaken  tradesmen  mistaken  statesman