Here's what rhymes with iliumination.
                        
                        
                    
                                nation  termination  animation  negation  summation  aeration  emanation  information  station  innovation  domination  elimination  illumination  imitation  nomination  notation  affirmation  annihilation  ionization  narration  automation  culmination  damnation  donation  germination  inhalation  intimation  intonation  oration  sedation  ablation  abomination  annotation  elation  inundation  education  operation  organization  relation  combination  creation  examination  formation  generation  duration  foundation  imagination  location  admiration  elevation  immigration  indication  inflation  isolation  migration  motivation  realization  rotation  salvation  sensation  taxation  violation  accommodation  agitation  alienation  allocation  assimilation  confirmation  estimation  inclination  inflammation  irrigation  medication  meditation  navigation  plantation  recommendation  temptation  vacation  assassination  aviation  causation  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implantation  imputation  masturbation  ornamentation  ovulation  perforation  perturbation  punctuation  recitation  relocation  renunciation  reparation  revocation  sedimentation  segmentation  subjugation  usurpation  vindication  visitation  population  communication  concentration  consideration  circulation  classification  cooperation  corporation  legislation  preparation  presentation  publication  transformation  accumulation  appreciation  cultivation  declaration  demonstration  discrimination  formulation  implementation  modification  preservation  restoration  stimulation  approximation  celebration  collaboration  computation  confrontation  congregation  consolidation  consultation  contemplation  continuation  coordination  degeneration  degradation  emancipation  excitation  frustration  manipulation  negotiation  propagation  recreation  rehabilitation  respiration  segregation  calibration  certification  clarification  colonization  complication  deprivation  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configuration  differentiation  expectation  exploitation  exploration  justification  transportation  acceleration  appropriation  arbitration  characterization  depreciation  documentation  incorporation  manifestation  proliferation  qualification  reconciliation  registration  speculation  amplification  articulation  civilisation  coagulation  deliberation  dislocation  dissociation  exaggeration  experimentation  fabrication  generalization  globalization  humiliation  infiltration  intoxication  liberalization  multiplication  socialization  sophistication  specialization  stabilization  stratification  categorization  conflagration  crystallization  deregulation  exaltation  exhortation  fertilization  fibrillation  gravitation  hybridization  inactivation  instrumentation  magnetization  magnification  nationalization  normalization  personification  polymerization  refrigeration  repudiation  standardization  stipulation  supplementation  interpretation  deterioration  precipitation  disintegration  transplantation  centralization  democratization  devaluation  diversification  excommunication  exportation  intensification  quantification  simplification  specification  industrialization  capitalization  hospitalization  conceptualization  decentralization  misrepresentation  Words that almost rhyme with iliumination
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