Here's what rhymes with indentation.
                        
                        
                    
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 proclamation  relaxation  specification  utilization  amplification  articulation  assassination  certification  civilisation  colonization  evacuation  experimentation  fragmentation  humiliation  preoccupation  privatization  pronunciation  ratification  specialization  subordination  transplantation  unification  verification  amalgamation  argumentation  capitulation  centralization  conciliation  confiscation  consecration  democratization  deregulation  exclamation  fertilization  hybridization  magnification  mortification  normalization  quantification  simplification  standardization  sterilization  stipulation  synchronization  utilisation  vaccination  accumulation  calculation  configuration  approximation  characterization  reconciliation  rehabilitation  clarification  coagulation  globalization  gratification  localization  multiplication  purification  signification  socialization  sophistication  stabilization  stratification  capitalization  categorization  conflagration  crystallization  decentralization  misrepresentation  nationalization  personification  visualization  classification  qualification  industrialization  liberalization  reorganization  calcification  diversification  hospitalization  rationalization  conceptualization  excommunication  Words that almost rhyme with indentation
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