Same word as volubility:

ability, appeal, articulation, command of language, delivery, diction, dramatic, expression, expressiveness, expressivity, facility, fervor, flow, fluency, force, forcefulness, gift of gab, grandiloquence, loquacity, meaningfulness, mellifluousness, oration, oratory, passion, persuasiveness, poise, power, rhetoric, spirit, style, vigor, vivacity, volubility, wit, wittiness