Thesaurus

Synonyms for Unpalatable include:

abhorrent, acerb, acerbic, acid, acrid, afflictive, awful, beastly, bitter, bland, blistering, brackish, caustic, charnel, creepy, detestable, disgustful, disgusting, displeasing, distasteful, dour, dreadful, embarrassing, evil, flat, flavorless, flavourless, forbidding, foul, ghastly, ghoulish, god-awful, grim, harsh, hateful, hellish, hideous, horrid, horrific, hot, ill-natured, indigestible, inedible, insipid, loathly, loathsome, morbid, mortifying, nasty, nonflavored, nonflavoured, objectionable, obnoxious, obscene, offensive, outrageous, painful, poisonous, rank, rebarbative, repellant, repellent, repelling, repugnant, repulsive, revolting, rough, savorless, savourless, scrimy, sepulchral, sharp, sharp-worded, skanky, sore, sulfurous, sulphurous, tart, tasteless, tasty, tough, unappetising, unappetizing, uneatable, unflavored, unflavoured, ungrateful, unhappy, unpalatable, unpleasant, unsalted, unsavory, unsavoury, unseasoned, vapid, venomous, verminous, virulent, vitriolic, wicked, yucky

unpalatable is a ADJ.