Here's what rhymes with supernumerary.
very vary marry fairy merry bury dairy ferry wary cherry hairy honorary berry sherry tarry parry harry nary tare barre terry faerie wherry monetary prairie emissary funerary scary ternary canary luminary unwary apiary nondairy necessary military literary temporary missionary dietary monastery urinary cemetery momentary pituitary unitary ancillary mercenary seminary commissary itinerary remarry unsanitary aviary buffoonery pessary equerry ordinary contemporary pulmonary unnecessary capillary commentary coronary imaginary solitary adversary maxillary pecuniary sanitary visionary corollary dysentery estuary planetary sedentary apothecary fiduciary mortuary papillary sanguinary cautionary centenary dignitary bacillary insanitary legionary actuary cassowary dromedary humeri lapidary bilberry elderberry nonliterary tercentenary topiary plagiary sectary secondary secretary arbitrary customary preliminary dictionary evolutionary hereditary sanctuary stationary fragmentary judiciary legendary proprietary tributary budgetary salutary veterinary culinary functionary obituary savagery stationery statuary paramilitary tutelary beriberi breviary diversionary nonmilitary concessionary huckleberry chokecherry uncustomary revolutionary subsidiary beneficiary disciplinary involuntary reactionary inflationary confectionery deflationary epistolary genitourinary interplanetary probationary recessionary voluptuary bicentenary elocutionary nonhereditary vocabulary discretionary exclusionary expansionary expeditionary constabulary eleemosynary geostationary extraordinary undersecretary noninflationary interdisciplinary cardiopulmonary counterrevolutionary multidisciplinary Words that almost rhyme with supernumerary
belly allele jelly deli telly smelly underbelly vermicelli many heavy ready fairly rarely barely semi petty levy penny heady levee messy jetty machete teddy bevy faery jenny kepi leggy recce sedgy veggie healthy steady wealthy deadly lengthy gentry fleshy antennae carefree medley sentry sexy sketchy sweaty unfairly vestry belfry deathly gayety hefty pebbly tempi testy breathy dressy marquetry pesky thready lefty wetly already directly especially twenty assembly scarcely correctly gently plenty freshly unhealthy densely frenzy squarely deftly spaghetti unsteady coquetry fleshly stealthy confetti fidgety tensely trendy aplenty libretti maidenly adeptly effendi friendly elementary indirectly intensely epilepsy immensely incorrectly intently halfpenny sullenly hostelry ineptly preciously woodenly unfriendly apoplexy excellency narcolepsy sacredly baronetcy deviancy reassembly complementary expressly confusedly grotesquely complexly ambivalently catalepsy cognoscenti penitently circumspectly equivalently