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