Here's what rhymes with toleration.
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dissertation imitation irritation navigation nomination notation oxidation plantation proclamation propagation reservation respiration temptation termination vacation authorization aviation calibration causation cessation dedication deliberation deprivation desolation desperation elaboration evaporation fascination federation habitation importation litigation modulation mutation narration polarization probation reformation retaliation retardation veneration vocation amputation bifurcation citation connotation culmination damnation demarcation deportation deputation divination donation emulation gestation inauguration inhalation innervation interpolation ovulation provocation recitation renovation revocation sanitation usurpation information organization situation combination association conversation determination evaluation foundation imagination legislation participation regulation reputation translation calculation conservation cultivation exploration formulation illustration immigration indication inflation inspiration limitation migration motivation organisation orientation preservation sensation stimulation accommodation arbitration celebration collaboration computation confirmation congregation coordination degeneration designation destination deterioration elimination estimation fixation frustration hesitation illumination implication inclination incorporation inflammation medication meditation penetration proliferation quotation recreation regeneration relaxation resignation segregation simulation speculation utilization valuation vegetation vibration affiliation annexation annihilation assassination attenuation coagulation colonization compilation complication consolation denomination dislocation dissipation distillation emigration evacuation exaggeration expiration fabrication fermentation filtration graduation incarnation insulation ionization irradiation mediation mobilization preoccupation realisation replication subordination adjudication 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