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