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