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