The Collaborative International Dictionary of English v.0.48:

Loquacity \Lo*quac"i*ty\, n. [L. loquacitas: cf. F.
   loquacit['e].]
   The habit or practice of talking continually or excessively;
   inclination to talk too much; talkativeness; garrulity.
   [1913 Webster]

         Too great loquacity and too great taciturnity by fits.
                                                  --Arbuthnot.
   [1913 Webster]

WordNet (r) 3.0 (2006):

loquacity
    n 1: the quality of being wordy and talkative [syn: garrulity,
         garrulousness, loquaciousness, loquacity,
         talkativeness]

Moby Thesaurus II by Grady Ward, 1.0:

34 Moby Thesaurus words for "loquacity":
   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



The Devil's Dictionary (1881-1906):

LOQUACITY, n.  A disorder which renders the sufferer unable to curb
his tongue when you wish to talk.