The Collaborative International Dictionary of English v.0.48:

Swinish \Swin"ish\, a.
   Of or pertaining to swine; befitting swine; like swine;
   hoggish; gross; beasty; as, a swinish drunkard or sot.
   "Swinish gluttony." --Milton. -- Swin"ish*ly, adv. --
   Swin"ish*ness, n.
   [1913 Webster]

WordNet (r) 3.0 (2006):

swinish
    adj 1: ill-mannered and coarse and contemptible in behavior or
           appearance; "was boorish and insensitive"; "the loutish
           manners of a bully"; "her stupid oafish husband";
           "aristocratic contempt for the swinish multitude" [syn:
           boorish, loutish, neanderthal, neandertal,
           oafish, swinish]
    2: resembling swine; coarsely gluttonous or greedy; "piggish
       table manners"; "the piggy fat-cheeked little boy and his
       porcine pot-bellied father"; "swinish slavering over food"
       [syn: hoggish, piggish, piggy, porcine, swinish]

Moby Thesaurus II by Grady Ward, 1.0:

129 Moby Thesaurus words for "swinish":
   Adamic, Apician, Circean, a hog for, acquisitive, all-devouring,
   animal, animalistic, asinine, avaricious, avid, beastlike, beastly,
   bestial, bibulous, bodily, bolting, bottomless, bovid, bovine,
   brutal, brute, brutish, caprid, caprine, carnal, carnal-minded,
   coarse, coveting, covetous, cowish, cowlike, cramming, crapulent,
   crapulous, deerlike, devouring, earthy, edacious, equestrian,
   equine, esurient, excessive, extravagant, extreme, fallen, feral,
   ferine, fleshly, glutting, gluttonizing, gluttonous, goatish,
   goatlike, gobbling, gorging, grabby, grasping, greedy, gross,
   gulping, guttling, guzzling, hircine, hoggish, hoofed, horsy,
   hyperphagic, immoderate, incontinent, indulgent, inordinate,
   insatiable, insatiate, intemperate, lapsed, limitless, material,
   materialistic, mercenary, miserly, money-hungry, money-mad, mulish,
   nonspiritual, omnivorous, orgiastic, overgreedy, overindulgent,
   overindulging, ovine, physical, piggish, polyphagic, postlapsarian,
   prodigal, quenchless, rapacious, ravening, ravenous, ruminant,
   self-indulgent, sheepish, sheeplike, slakeless, sordid, stuffing,
   too much, unappeasable, unappeased, unbridled, unconstrained,
   uncontrolled, undisciplined, unfrugal, ungulate, unlimited,
   unmeasured, unquenchable, unrestrained, unsated, unsatisfied,
   unslakeable, unslaked, unspiritual, unthrifty, venal, voracious,
   wolfing