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