The Collaborative International Dictionary of English v.0.48:

Unsavory \Unsavory\
   See savory.

WordNet (r) 3.0 (2006):

unsavory
    adj 1: morally offensive; "an unsavory reputation"; "an unsavory
           scandal" [syn: unsavory, unsavoury, offensive]
           [ant: savory, savoury]
    2: not pleasing in odor or taste [syn: distasteful,
       unsavory, unsavoury]

Moby Thesaurus II by Grady Ward, 1.0:

121 Moby Thesaurus words for "unsavory":
   amoral, bitter, conscienceless, corrupt, corrupted, criminal,
   crooked, dark, dead, derogatory, devious, dilute, diluted,
   disagreeable, discreditable, disgusting, dishonest, dishonorable,
   dislikable, displeasing, disreputable, distasteful, doubtful,
   dubious, evasive, fade, felonious, fishy, flat, flavorless,
   foul-tasting, fraudulent, gruelly, ignoble, ignominious,
   ill-flavored, ill-got, ill-gotten, immoral, inane, indifferent,
   indirect, infamous, inglorious, insidious, insipid, jejune, mild,
   milk-and-water, nasty, nauseating, not kosher, notorious,
   objectionable, obnoxious, offensive, pappy, pulpy, questionable,
   repellent, repugnant, repulsive, revolting, rotten, sapless,
   savorless, seamy, shady, shameless, shifty, sickening, sinister,
   slippery, sordid, sour, spiceless, stale, suspicious, tasteless,
   thankless, thin, tricky, ugly, unalluring, unappealing,
   unappetizing, unattractive, unconscienced, unconscientious,
   unconscionable, undelectable, undelicious, underhand, underhanded,
   undesirable, unengaging, unenjoyable, unethical, unflavored,
   uninviting, unlikable, unpalatable, unpleasant, unpleasing,
   unpraiseworthy, unprincipled, unrespectable, unscrupulous,
   unstraightforward, untasteful, untasty, unwelcome, vapid, washy,
   watered, watered-down, watery, weak, wishy-washy, without remorse,
   without shame