Synonyms and related words :
adulterated, blemished, careless, damaged, defective, deficient, errable, errant, erroneous, error-prone, faulty, found wanting, heedless, immature, impaired, imperfect, imprecise, impure, inaccurate, inadequate, incomplete, inexact, lacking, liable to error, makeshift, mediocre, mixed, not perfect, off, open to error, partial, patchy, short, sketchy, undeveloped, uneven, unfinished, unperfected, unsound, unthorough, wanting