Synonyms and related words :
amiss, bad, bum, crappy, defective, deficient, disappointing, disheartening, displeasing, dissatisfactory, failing, falling short, faulty, flawed, found wanting, imperfect, inadequate, inappropriate, incommensurate, incompetent, incomplete, inferior, insufficient, lacking, not enough, not good enough, poor, punk, rotten, second best, tantalizing, teasing, too little, unacceptable, unequal to, unfulfilling, ungratifying, unqualified, unsatisfying, unsufficing, unsuitable, unworthy, up, wanting, weak, wrong