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