The Collaborative International Dictionary of English v.0.48:

Voracity \Vo*rac"i*ty\, n. [L. voracitas: cf. F. voracit['e].]
   The quality of being voracious; voraciousness.
   [1913 Webster]

WordNet (r) 3.0 (2006):

voracity
    n 1: excessive desire to eat [syn: edacity, esurience,
         ravenousness, voracity, voraciousness]
    2: extreme gluttony [syn: edacity, esurience,
       rapaciousness, rapacity, voracity, voraciousness]

Moby Thesaurus II by Grady Ward, 1.0:

43 Moby Thesaurus words for "voracity":
   acquisitiveness, avarice, avariciousness, avidity, avidness,
   covetousness, crapulence, crapulency, cupidity, edacity,
   frenzy of desire, fury of desire, gluttonousness, gluttony,
   grasping, graspingness, greed, greediness, gulosity, hoggishness,
   hyperphagia, incontinence, inordinate desire, insatiability,
   insatiable desire, intemperance, intemperateness, itching palm,
   lust, omnivorousness, overeating, overgreediness, overindulgence,
   piggishness, polyphagia, rapaciousness, rapacity, ravenousness,
   sordidness, swinish gluttony, swinishness, voraciousness,
   wolfishness