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