The Collaborative International Dictionary of English v.0.48:

Cupidity \Cu*pid"i*ty\ (k?-p?d"?-t?), n. [F. cupidite, L.
   cupiditas, fr. cupidus longing, desiring, fr. cupere to long
   for, desire. See Covet.]
   1. A passionate desire; love. [Obs.]
      [1913 Webster]

   2. Eager or inordinate desire, especially for wealth; greed
      of gain; avarice; covetousness.
      [1913 Webster]

            With the feelings of political distrust were mingled
            those of cupidity and envy, as the Spaniard saw the
            fairest provinces of the south still in the hands of
            the accursed race of Ishmael.         --Prescott.
      [1913 Webster]

WordNet (r) 3.0 (2006):

cupidity
    n 1: extreme greed for material wealth [syn: avarice,
         avariciousness, covetousness, cupidity]

Moby Thesaurus II by Grady Ward, 1.0:

37 Moby Thesaurus words for "cupidity":
   acquisitiveness, avarice, avariciousness, avidity, avidness,
   covetousness, craving, desire, eagerness, frenzy of desire,
   fury of desire, gluttony, grasping, graspingness, greed,
   greediness, hoggishness, incontinence, infatuation,
   inordinate desire, insatiability, insatiable desire,
   intemperateness, itching palm, lust, overgreediness, passion,
   piggishness, possessiveness, rapaciousness, rapacity, ravenousness,
   sordidness, swinishness, voraciousness, voracity, wolfishness