Here's what rhymes with constipation.
                        
                        
                    
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categorization  crystallization  delineation  denunciation  duplication  elongation  enumeration  exclamation  extermination  immunization  inactivation  inauguration  inoculation  instrumentation  interrogation  intimidation  liquidation  magnification  mortification  ornamentation  prolongation  quantification  reclamation  refrigeration  relocation  repudiation  resuscitation  standardization  sterilization  supplementation  utilisation  representation  accumulation  differentiation  implementation  organisation  approximation  characterization  continuation  documentation  proliferation  recommendation  reconciliation  specification  articulation  clarification  disintegration  generalization  globalization  humiliation  intoxication  localization  pronunciation  purification  remuneration  signification  stratification  argumentation  centralization  deregulation  devaluation  nationalization  normalization  personification  polymerization  renunciation  simplification  visualization  administration  identification  discrimination  experimentation  liberalization  reorganization  conceptualization  democratization  diversification  hospitalization  intensification  rationalization  synchronization  industrialization  decentralization  excommunication  misrepresentation  Words that almost rhyme with constipation
basin  occasion  haven  hasten  persuasion  evasion  equation  invasion  taken  pagan  bacon  undertaken  patron  shaken  awaken  laden  maiden  layman  laymen  shaman  contagion  overtaken  straighten  mistaken  statesman  salesman  forsaken  tradesmen