(n.) The habit or practice of talking continually or excessively; inclination to talk too much; talkativeness; garrulity.

big mouth candor communicativeness conversableness effusion effusiveness flow of words flowing tongue fluency fluent tongue flux de bouche flux de paroles flux of words frankness garrulity garrulousness gassiness gift of gab glibness gregariousness gush gushiness long-windedness loose tongue loquaciousness openness prolixity slush sociability spate of words talkativeness verbosity volubility windiness