[syn: edacious, esurient, rapacious, ravening, ravenous, voracious, wolfish]
The Collaborative International Dictionary of English v.0.48:
Voracious \Vo*ra"cious\, a. [L. vorax, -acis, fr. vorare to
   devour; akin to Gr. ? meat, food, ? to devour, Skr. gar. Cf.
   Devour.]
   Greedy in eating; very hungry; eager to devour or swallow;
   ravenous; gluttonous; edacious; rapacious; as, a voracious
   man or appetite; a voracious gulf or whirlpool. --Dampier. --
   Vo*ra"cious*ly, adv. -- Vo*ra"cious*ness, n.
   [1913 Webster]
WordNet (r) 3.0 (2006):
voracious
    adj 1: excessively greedy and grasping; "a rapacious divorcee on
           the prowl"; "ravening creditors"; "paying taxes to
           voracious governments" [syn: rapacious, ravening,
           voracious]
    2: devouring or craving food in great quantities; "edacious
       vultures"; "a rapacious appetite"; "ravenous as wolves";
       "voracious sharks" [syn: edacious, esurient, rapacious,
       ravening, ravenous, voracious, wolfish]
Moby Thesaurus II by Grady Ward, 1.0:
94 Moby Thesaurus words for "voracious":
   Apician, a hog for, acquisitive, all-devouring, ardent, avaricious,
   avid, bolting, bottomless, cormorant, coveting, covetous, cramming,
   crapulent, crapulous, desirous, devoted, devouring, dog-hungry,
   eager, earnest, edacious, empty, enormous, enthusiastic, esurient,
   famished, famishing, fasting, fervent, fervid, glutting,
   gluttonizing, gluttonous, gobbling, gorging, grabby, grasping,
   greedy, gulping, guttling, guzzling, half-famished, half-starved,
   hoggish, hungering, hungry, hyperphagic, insatiable, insatiate,
   intemperate, limitless, mercenary, miserly, money-hungry,
   money-mad, omnivorous, overgreedy, passionate, peckish, piggish,
   pinched with hunger, polyphagic, predacious, prodigious,
   quenchless, rapacious, ravening, ravenous, satiating, sating,
   sharp-set, slakeless, sordid, starved, starving, stuffing,
   surfeiting, swinish, thirsty, unappeasable, unappeased,
   uncontrollable, uncontrolled, unfilled, unquenchable, unsated,
   unsatisfied, unslakeable, unslaked, venal, wolfing, wolfish,
   zealous