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