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