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