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