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