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