Here's what rhymes with substitionary.
marry merry nary very vary missionary dictionary fairy stationary bury dairy ferry visionary wary cherry dysentery hairy berry sherry stationery tarry canary parry unwary harry tare barre terry faerie wherry necessary urinary prairie estuary honorary mercenary seminary emissary scary ternary cautionary remarry bacillary buffoonery apiary humeri nondairy military ordinary secondary temporary customary pulmonary coronary dietary hereditary imaginary solitary adversary cemetery disciplinary judiciary legendary sanitary ancillary discretionary sedentary veterinary apothecary functionary funerary papillary sanguinary centenary deflationary dignitary epistolary luminary probationary aviary beriberi diversionary legionary pessary cassowary concessionary equerry geostationary recessionary bilberry elderberry sectary literary secretary monetary preliminary unnecessary capillary commentary evolutionary sanctuary subsidiary involuntary momentary pituitary reactionary tributary unitary budgetary corollary inflationary planetary salutary commissary fiduciary itinerary mortuary obituary savagery statuary confectionery expansionary expeditionary breviary insanitary actuary dromedary huckleberry lapidary tercentenary topiary chokecherry plagiary revolutionary arbitrary monastery beneficiary fragmentary maxillary pecuniary proprietary culinary exclusionary genitourinary paramilitary supernumerary tutelary unsanitary eleemosynary voluptuary bicentenary elocutionary nonliterary uncustomary contemporary extraordinary vocabulary interdisciplinary multidisciplinary constabulary nonmilitary nonhereditary cardiopulmonary interplanetary undersecretary counterrevolutionary Words that almost rhyme with substitionary
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 deviancy preciously woodenly indirectly expressly incorrectly apoplexy complexly ambivalently reassembly penitently complementary confusedly equivalently grotesquely narcolepsy catalepsy circumspectly cognoscenti