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