collection vs category

Other hyponyms of collection include procession, pharmacopoeia, string, wardrobe, wardrobe, population, universe, armamentarium, art collection, backlog, battery, block, book, rule book, book, bottle collection, bunch, caboodle, lot, coin collection, collage, content, contents, ensemble, tout ensemble, corpus, crop, tenantry, findings, flagging, flinders, pack, deal, hand, long suit, herbarium, stamp collection, statuary, sum, sum total, summation, agglomeration, gimmickry, nuclear club, agglomerate, cumulation, cumulus, heap, mound, pile, mass, combination, congregation, hit parade, Judaica, kludge, library, program library, subroutine library, library, mythology, biology, biota, fauna, zoology, petting zoo, set, Victoriana, class, family, job lot, bundle, package, packet, parcel, defence, defense, defense lawyers, defense team, prosecution, planting, signage, GAAP, generally accepted accounting principles, pantheon, Free World, Third World, Europe, Asia, North America, Central America, South America, Oort cloud, galaxy, extragalactic nebula, galaxy, fleet, fleet, fleet, repertoire, repertory, repertoire, repertory, assortment, miscellanea, miscellany, mixed bag, mixture, motley, potpourri, salmagundi, smorgasbord, variety, batch, clutch, batch, rogue's gallery, exhibition, expo, exposition, convoy, traffic, air power, aviation, botany, flora, vegetation, jurisprudence, law, menagerie, data, information, ana, mail, post, treasure, treasure trove, trinketry, troponomy, troponymy, smithereens, tripton, napoleoniana, problematics, audio library.