overage

overage
    adj 1: too old to be useful; "He left the house...for the
           support of twelve superannuated wool carders"- Anthony
           Trollope [syn: {overage}, {overaged}, {superannuated},
           {over-the-hill}]
    n 1: a surplus or excess of money or merchandise that is
         actually on hand and that exceeds expectations
    

25 Moby Thesaurus words for "overage":
      balance, bonus, dividend, excess, extra, gratuity, lagniappe,
      leftover, margin, overmeasure, overplus, overrun, overset,
      overstock, oversupply, plus, pourboire, redundancy, remainder,
      something extra, spare, superfluity, surplus, surplusage, tip