Here's what rhymes with companionability.
inability motility arability stability facility liability permeability durability infertility sterility immobility usability mutability readability gullibility amenability audibility flammability livability puerility tenability attainability edibility likability likeability notability risibility liveability disability instability credibility visibility vulnerability eligibility suitability comparability tranquility affability culpability gentility immutability unreliability unsuitability changeability impermeability miscibility pliability curability equability inalienability inflammability navigability provability immovability memorability inaudibility marriageability potability venerability useability humility sensibility variability impossibility accessibility plausibility sustainability advisability intelligibility convertibility fallibility portability unavailability invincibility invulnerability maneuverability marketability separability serviceability fusibility incivility irascibility tractability habitability impregnability incorrigibility incredibility ineffability ineligibility manageability penetrability impressionability reputability quotability desirability profitability incompatibility inevitability excitability infallibility insensibility dependability interoperability unpredictability inseparability interchangeability impenetrability implausibility intractability undesirability impassibility inconceivability invariability manoeuvrability inexorability nonavailability demonstrability respectability predictability reproducibility digestibility inflexibility indispensability perfectibility inadvisability destructibility suggestibility indestructibility biodegradability incontestability Words that almost rhyme with companionability
virginity chillingly typically willingly anonymity inactivity passivity avidity civilly hillbilly insipidity rancidity torpidity limpidity idyllically tepidity piggishly authenticity ethnicity rigidly admittedly connectivity iniquity stupidity duplicity lucidity maliciously mimicry unwillingly cupidity emissivity fittingly positivity transitivity ubiquity wickedly cyclically derisively wittingly officiously piercingly serendipity terrifically atypically thrillingly forbiddingly gimmickry uncivilly untypically winningly stiltedly principally sensitivity multiplicity objectivity analytically unwittingly artistically equanimity judiciously receptivity infectivity interactivity intrepidity rhythmically capriciously mystically submissively whimsically injudiciously juridically logistically lyrically frigidly impassivity unstintingly bewitchingly horrifically pacifically permissively befittingly inimically searingly skittishly specifically subjectivity hyperactivity prodigiously unflinchingly unremittingly unthinkingly cryptically dismissively elliptically flaccidity prolifically sneeringly synchronicity egotistically unblinkingly agonisingly avariciously apolitically lubriciously cliquishly instinctively convincingly exquisitely realistically linguistically reflexivity stylistically euphemistically unrealistically holistically unconvincingly vindictively altruistically aphoristically egoistically legalistically moralistically surrealistically domineeringly insistingly patronymically distinctively descriptively heuristically opportunistically simplistically anachronistically antagonistically fatalistically idealistically restrictively patronisingly prescriptively characteristically psychoanalytically materialistically uncharacteristically capitalistically imperialistically