OK, absolute, acceptable, adequate, admissible, all right, ample, assuring, authoritative, barely sufficient, better than nothing, cogent, comfortable, commensurate, competent, conclusive, convictional, convincing, corresponding, decent, decisive, determinative, due, enough, equal to, fair, fairish, fit, good, good enough, goodish, impressive, minimal, minimum, moderate, not amiss, not bad, not half bad, not so bad, okay, passable, persuasive, plenty, plenty good enough, presentable, pretty good, proportionable, proportionate, respectable, satisfying, solid, sound, substantial, sufficient, sufficient for, sufficing, suitable, telling, tidy, tolerable, unexceptionable, unexceptional, unimpeachable, unobjectionable, up to, workmanlike