abatement, agio, allowance, bank discount, blemish, block, blockade, bottleneck, breakage, bug, cash discount, catch, chain discount, charge-off, concession, cordon, crack, curtain, cut, damage, deduction, defect, defection, deficiency, depreciation, determent, deterrent, detriment, difficulty, disability, disadvantage, discount, evil, failing, failure, fault, faute, flaw, foible, frailty, handicap, hang-up, harm, hazard, hindrance, hitch, hole, hurdle, hurt, ill, impairment, impediment, imperfection, inadequacy, inconvenience, infirmity, injury, joker, kickback, kink, liability, little problem, loss, loss of ground, mischief, objection, obstacle, obstruction, obstructive, one small difficulty, penalty, penalty clause, percentage, prejudice, premium, price-cut, price reduction, problem, rebate, rebatement, reduction, refund, rift, rollback, rub, salvage, setoff, shortcoming, snag, something missing, step backward, stumbling block, stumbling stone, taint, tare, time discount, trade discount, tret, trouble, underselling, vulnerable place, weak link, weak point, weakness, write-off