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