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