Here's what rhymes with polybasicity.
toxicity felicity publicity plasticity rusticity simplicity elasticity specificity domesticity catholicity infelicity electricity complicity periodicity eccentricity egocentricity Words that almost rhyme with polybasicity
activity nativity declivity festivity acclivity creativity captivity relativity proclivity productivity selectivity negativity conductivity radioactivity exclusivity insensitivity superconductivity affinity divinity symmetry acidity asymmetry simile fixity rickety docility villainy virility finicky fiscally ability sympathy dignity validity vicinity fertility tyranny infinity visually bigotry civility minutely salinity solidity symphony timidity agility debility distally fearfully fluidity litany trinity turbidity cheerily fitfully senility servility signally bigamy billowy placidity timothy wittily scurrility willowy possibility hostility ministry mobility utility nobility officially proximity cheerfully humidity rapidity rigidity viability visibly vividly busily chivalry futility persistently skillfully ductility epitome fearlessly fragility polygamy prettily sublimity timidly wilfully wistfully blissfully distantly ritually viciously willfully dismally flippancy frigidity guiltily legibility prolixity tearfully diffidently dizzily flippantly stolidity efficiency probability deficiency differently explicitly initially antiquity capability efficiently implicitly artificially feasibility inherently morbidity antipathy facsimile femininity irritability liquidity unanimity volatility alkalinity assiduously indignity sociability soliloquy versatility amiability epiphany exigency insistently invalidity judicially listlessly coherency polyphony aborigine abysmally invincibly privily sufficiently availability consistently consistency conspiracy reliability applicability proficiency sufficiency tranquillity adaptability brilliancy brilliantly religiously irresistibly admissibility beneficially calligraphy deliciously hospitably invisibly resiliency reversibility stringency unofficially affordability divisibility malleability minstrelsy quizzically stringently auspiciously responsibility flexibility delinquency masculinity indifferently indignantly inefficiency intermittently malignancy superficially magnanimity predictably suspiciously improbability invisibility incoherently inefficiently pusillanimity ambitiously fictitiously contingency inconsistency insufficiency susceptibility acceptability compatibility insufficiently irresponsibility surreptitiously inviolability practicability contingently inconsistently indivisibility expeditiously inaccessibility inexplicably unpredictably immunodeficiency impracticability