Here's what rhymes with assentation.
                        
                        
                    
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proliferation  reconciliation  rehabilitation  relaxation  specification  utilization  amplification  certification  colonization  denomination  evacuation  generalization  intoxication  ratification  remuneration  signification  socialization  specialization  stabilization  subordination  unification  amalgamation  confiscation  consecration  denunciation  devaluation  duplication  exclamation  extermination  fertilization  hybridization  inoculation  instrumentation  magnetization  mortification  personification  renunciation  repudiation  standardization  sterilization  synchronization  utilisation  visualization  classification  transformation  calculation  approximation  characterization  qualification  articulation  clarification  coagulation  experimentation  globalization  gratification  localization  multiplication  preoccupation  privatization  pronunciation  purification  stratification  transplantation  calcification  categorization  conflagration  crystallization  decentralization  deregulation  magnification  nationalization  normalization  polymerization  quantification  rationalization  liberalization  reorganization  capitalization  conceptualization  democratization  diversification  hospitalization  intensification  misrepresentation  excommunication  industrialization  Words that almost rhyme with assentation
basin  haven  hasten  occasion  invasion  evasion  equation  persuasion  taken  pagan  bacon  patron  shaken  laden  maiden  layman  laymen  shaman  mistaken  awaken  contagion  straighten  undertaken  statesman  salesman  forsaken  overtaken  tradesmen