productive

from WordNet (r) 3.0 (2006)

productive
    adj 1: producing or capable of producing (especially
           abundantly); "productive farmland"; "his productive
           years"; "a productive collaboration" [ant:
           {unproductive}]
    2: having the ability to produce or originate; "generative
       power"; "generative forces" [syn: {generative}, {productive}]
       [ant: {consumptive}]
    3: yielding positive results
    4: marked by great fruitfulness; "fertile farmland"; "a fat
       land"; "a productive vineyard"; "rich soil" [syn: {fat},
       {fertile}, {productive}, {rich}]

from The Collaborative International Dictionary of English v.0.48

Productive \Pro*duc"tive\, a. [F. productif, L. productivus fit
   for prolongation.]
   [1913 Webster]
   1. Having the quality or power of producing; yielding or
      furnishing results; as, productive soil; productive
      enterprises; productive labor, that which increases the
      number or amount of products.
      [1913 Webster]

   2. Bringing into being; causing to exist; producing;
      originative; as, an age productive of great men; a spirit
      productive of heroic achievements.
      [1913 Webster]

            And kindle with thy own productive fire. --Dryden.
      [1913 Webster]

            This is turning nobility into a principle of virtue,
            and making it productive of merit.    --Spectator.
      [1913 Webster]

   3. Producing, or able to produce, in large measure; fertile;
      profitable.
      [1913 Webster] -- {Pro*duc"tive*ly}, adv. --
      {Pro*duc"tive*ness}, n.
      [1913 Webster]

131 Moby Thesaurus words for "productive": able, abounding, abundant, adequate, advantageous, affluent, all-sufficing, ample, aplenty, banausic, blooming, bottomless, bounteous, bountiful, breadwinning, bursting, bursting out, capable, causative, competent, conceptive, conceptual, constructive, copious, creative, demiurgic, diffuse, diffusive, dynamic, effective, effectual, efficacious, efficient, effuse, effusive, epidemic, equal to, esemplastic, exhaustless, extravagant, exuberant, fat, fecund, fertile, flourishing, flush, formative, formless, fructiferous, fruitful, full, gainful, galore, generative, generous, germinal, gushing, gushy, ideational, ideative, imaginative, in plenty, in quantity, inexhaustible, ingenious, inspired, inventive, lavish, liberal, lucrative, lush, luxuriant, many, maximal, moneymaking, much, notional, numerous, opulent, original, originative, overflowing, paying, plenitudinous, plenteous, plentiful, plenty, pleonastic, pregnant, prevailing, prevalent, prodigal, proficient, profitable, profuse, profusive, proliferous, prolific, rampant, redundant, reiterative, remunerative, repetitive, replete, resourceful, rewarding, rich, rife, riotous, running over, seminal, shaping, spawning, superabundant, swarming, tautologous, teeming, thriving, uberous, up to, valuable, vigorous, visioned, wealthy, well-found, well-furnished, well-paying, well-provided, well-stocked, wholesale, worthwhile