Here's what rhymes with nonconvexity.
convexity complexity perplexity Words that almost rhyme with nonconvexity
necessity density sesame verity heavily intensity seventy deputy heredity heresy parity felony rarity sensibly serenity severally verily immensity amenity confessedly flexibly inequity velvety acerbity identity readily destiny penalty specially steadily clarity fidelity heavenly jealousy legacy mentally secondly sincerity centrally specialty brevity incessantly indemnity leprosy solemnity insensibly merrily recklessly temerity warily wearily celerity hilarity mastectomy helpfully nonentity testily unsteadily vasectomy inflexibly retinae senselessly carefully essentially successfully tendency chemistry integrity chemically disparity hegemony ostensibly peasantry polarity posterity terribly ascendancy carelessly helplessly longevity pedigree tenancy ascendency contentedly dentistry jealously medically weaponry acceptably heraldry insincerity pedantry revelry unbearably impeccably legibly tangentially tenantry blessedly devilry fretfully negligee selflessly temperately uneventfully apparently necessarily presently prosperity similarity extremity familiarity ordinarily solidarity supremacy allegedly expectancy incidentally momentarily pleasantly respectfully dexterity unsuccessfully clemency dreadfully hysterectomy marvellously restlessly secondarily sequentially splendidly breathlessly clandestinely expectantly incrementally indelibly lamentably pleasantry professedly telemetry telepathy unpleasantly credibly impetuously incontestably resentfully respectably tonsillectomy unacceptably angularity appendectomy primarily popularity potentially pregnancy dependency fundamentally temporarily voluntarily accidentally regularity transparency conscientiously customarily incredibly singularity tremendously unnecessarily contemptuously militarily preferentially coincidentally confidentially granularity transparently inclemency indispensably quintessentially sentimentally subsidiarity unfamiliarity independently arbitrarily discrepancy peculiarity environmentally irregularity biochemistry relentlessly inexpressibly providentially regretfully biochemically existentially geochemistry instrumentally regrettably temperamentally experimentally exponentially superintendency developmentally extraordinarily