The Collaborative International Dictionary of English v.0.48:

Palatable \Pal"a*ta*ble\, a. [From Palate.]
   Agreeable to the palate or taste; savory; hence, acceptable;
   pleasing; as, palatable food; palatable advice. Opposite of
   unpalatable.
   [1913 Webster]

WordNet (r) 3.0 (2006):

palatable
    adj 1: acceptable to the taste or mind; "palatable food"; "a
           palatable solution to the problem" [syn: palatable,
           toothsome] [ant: unpalatable]

Moby Thesaurus II by Grady Ward, 1.0:

44 Moby Thesaurus words for "palatable":
   agreeable, ambrosial, appetizing, comestible, dainty, delectable,
   delicate, delicious, delightful, eatable, edible, esculent,
   exquisite, flavorsome, good, good to eat, good-tasting, gustable,
   gusty, juicy, kosher, likable, luscious, lush, mouth-watering,
   nectareous, nectarous, nice, of gourmet quality, pleasing,
   relishing, sapid, saporific, saporous, savorous, savory,
   scrumptious, succulent, tasteful, tasty, tempting, toothsome,
   toothy, yummy