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