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