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