The Collaborative International Dictionary of English v.0.48:

Lucre \Lu"cre\, n. [F. lucre, L. lucrum.]
   Gain in money or goods; profit; riches; -- often in an ill
   sense.
   [1913 Webster]

         The lust of lucre and the dread of death. --Pope.
   [1913 Webster]

WordNet (r) 3.0 (2006):

lucre
    n 1: informal terms for money [syn: boodle, bread,
         cabbage, clams, dinero, dough, gelt, kale,
         lettuce, lolly, lucre, loot, moolah, pelf,
         scratch, shekels, simoleons, sugar, wampum]
    2: the excess of revenues over outlays in a given period of time
       (including depreciation and other non-cash expenses) [syn:
       net income, net, net profit, lucre, profit,
       profits, earnings]

Moby Thesaurus II by Grady Ward, 1.0:

107 Moby Thesaurus words for "lucre":
   affluence, and pence, assets, bottomless purse, bulging purse,
   capital gains, cash, circulating medium, cleanup, clear profit,
   coinage, coined liberty, cold cash, currency, dividends, dollars,
   dough, earnings, easy circumstances, embarras de richesses,
   emergency money, filthy lucre, fortune, fractional currency, gain,
   gains, get, gettings, gleanings, gold, greenbacks, gross,
   gross profit, handsome fortune, hard cash, hard currency,
   high income, high tax bracket, hoard, income, independence,
   interest, jack, kale, killing, legal tender, lettuce, loot,
   luxuriousness, makings, mammon, managed currency, material wealth,
   mazuma, medium of exchange, mintage, money, money to burn,
   moneybags, neat profit, necessity money, net, net profit, opulence,
   opulency, paper profits, pelf, percentage, perk, perks, perquisite,
   pickings, possessions, postage currency, postal currency, pounds,
   proceeds, profit, profits, property, prosperity, prosperousness,
   rake-off, receipts, return, returns, riches, richness, scrip,
   shillings, silver, six-figure income, soft currency, specie,
   sterling, store, substance, take, take-in, the almighty dollar,
   the wherewith, the wherewithal, treasure, upper bracket, wealth,
   wealthiness, winnings



Easton's 1897 Bible Dictionary:

Lucre
   from the Lat. lucrum, "gain." 1 Tim. 3:3, "not given to filthy
   lucre." Some MSS. have not the word so rendered, and the
   expression has been omitted in the Revised Version.


Bouvier's Law Dictionary, Revised 6th Ed (1856):

LUCRE. Gain, profit. Cl. des Lois Rom. h.t.