Synonyms and related words :
bitter, disagreeable, dislikable, displeasing, distasteful, homely, sour, thankless, ugly, unappealing, unappetizing, unattractive, unbeauteous, unbeautiful, uncomely, undelectable, undelicious, undesirable, unengaging, unenjoyable, unhandsome, uninviting, unlikable, unpalatable, unpleasant, unpleasing, unpretty, unsavory, untasteful, unwelcome