volubility(n = noun.attribute) articulateness, fluency - the quality of being facile in speech and writing;
is a kind of communicativeness
Derived form adjective voluble₁

   The quality or state of being voluble (in any of the senses of the adjective). [1913 Webster]

N  loquacity, loquaciousness, talkativeness, garrulity, multiloquence, much speaking, jaw, gabble, jabber, chatter, prate, prattle, cackle, clack, twaddle, twattle, rattle, caquet, caquetterie, blabber, bavardage, bibble-babble, gibble-gabble, small talk, fluency, flippancy, volubility, flowing, tongue, flow of words, flux de bouche, flux de mots, copia verborum, cacoethes loquendi, furor loquendi, verbosity, gift of the gab, talker, chatterer, chatterbox, babbler, rattle, ranter, sermonizer, proser, driveler, blatherskite, gossip, magpie, jay, parrot, poll, Babel, moulin a paroles, loquacious, talkative, garrulous, linguacious, multiloquous, largiloquent, chattering, chatty, declamatory, open-mouthed, fluent, voluble, glib, flippant, long tongued, long winded, trippingly on the tongue, glibly, off the reel, the tongue running fast, the tongue running loose, the tongue running on wheels, all talk and no cider, foul whisperings are abroad, what a spendthrift is he of his tongue!.