not bad(s = adj.all) bang-up, bully, corking, cracking, dandy, great, groovy, keen, neat, nifty, peachy, slap-up, smashing, swell - very good; "he did a bully job"; "a neat sports car"; "had a great time at the party"; "you look simply smashing"

N  imperfection, imperfectness, deficiency, inadequacy, peccancy, immaturity, fault, defect, weak point, screw loose, flaw, gap, twist, taint, attainder, bar sinister, hole in one's coat, blemish, weakness, half blood, shortcoming, drawback, seamy side, mediocrity, no great shakes, no great catch, not much to boast of, one-horse shay, imperfect, not perfect, deficient, defective, faulty, unsound, tainted, out of order, out of tune, cracked, leaky, sprung, warped, lame, injured, peccant, frail, inadequate, crude, incomplete, found wanting, below par, short-handed, below its full strength, under its full strength, below its full complement, indifferent, middling, ordinary, mediocre, average, so-so, coucicouci, milk and water, tolerable, fair, passable, pretty well, pretty good, rather good, moderately good, good, good enough, well enough, adequate, decent, not bad, not amiss, inobjectionable, unobjectionable, admissible, bearable, only better than nothing, secondary, inferior, second-rate, second-best, one-horse, almost, to a limited extent, rather, pretty, moderately, passing, only, considering, all things considered, enough, surgit amari aliquid.

bad, bad block, bad blood, bad boy, bad breath, bad character, bad check, bad cheque, bad condition, bad debt, bad egg, bad fairy, bad faith, bad guy, bad habit, bad hat, bad influence, bad job, bad lands, bad language, bad lot, bad luck, bad manners, bad name, bad news, bad notices, bad person, bad press, bad taste, bad temper, bad weather, go bad, if not, in a bad way, last but not least, last not least, more often than not, not, not a bit, not absolutely, not accept, not admit, not all there, not at all, not budge, not buy, not by a blame sight, not by a long sight, not care for, not comparable, not compare, not cricket, not delayed, not done, not due, not easy, not far, not fluently, not guilty, not hesitate, not in the mood, not intrusive, not kosher, not late, not listed, not listen, not long, not mind, not only, not right, not suitably, not surprised, not swallow, not to be believed, not to be had, not to mention, not touch, not traded, not true, not very likely, not with it, not yet, too bad