Synonyms and related words :
abhorrent, bad, bitter, disagreeable, dislikable, displeasing, distasteful, foul-tasting, ill-flavored, intolerable, mislikable, odious, rotten, sour, thankless, ugly, unalluring, unappealing, unappetizing, unattractive, uncongenial, undelectable, undelicious, undesirable, unengaging, unenjoyable, unhappy, uninviting, unlikable, unlovable, unpalatable, unpleasing, unsavory, untasteful, untasty, unwelcome