[syn: ample, copious, plenteous, plentiful, rich]
The Collaborative International Dictionary of English v.0.48:
Copious \Co"pi*ous\, a. [L. copiosus, fr. copia abundance: cf.
   F. copieux. See Copy, Opulent.]
   Large in quantity or amount; plentiful; abundant; fruitful.
   [1913 Webster]
         Kindly pours its copious treasures forth. --Thomson.
   [1913 Webster]
         Hail, Son of God, Savior of men! thy name
         Shall be the copious matter of my song.  --Milton.
   Syn: Ample; abundant; plentiful; plenteous; rich; full;
        exuberant; overflowing; full. See Ample.
        [1913 Webster]
WordNet (r) 3.0 (2006):
copious
    adj 1: large in number or quantity (especially of discourse);
           "she took copious notes"; "a subject of voluminous
           legislation" [syn: copious, voluminous]
    2: affording an abundant supply; "had ample food for the party";
       "copious provisions"; "food is plentiful"; "a plenteous grape
       harvest"; "a rich supply" [syn: ample, copious,
       plenteous, plentiful, rich]
Moby Thesaurus II by Grady Ward, 1.0:
93 Moby Thesaurus words for "copious":
   abounding, abundant, affluent, all-sufficing, ample, aplenty,
   blooming, bottomless, bounteous, bountiful, broad, bursting,
   bursting out, capacious, comprehensive, countless, creative,
   diffuse, diffusive, effuse, effusive, epidemic, exhaustless,
   expansive, extensive, extravagant, exuberant, fat, fecund, fertile,
   flourishing, flush, formless, fructiferous, fruitful, full, galore,
   generous, gushing, gushy, in plenty, in quantity, inexhaustible,
   lavish, liberal, lush, luxuriant, many, maximal, much,
   multitudinous, numerous, opulent, overflowing, plenitudinous,
   plenteous, plentiful, plenty, pleonastic, pregnant, prevailing,
   prevalent, prodigal, productive, profuse, profusive, proliferous,
   prolific, rampant, redundant, reiterative, repetitive, replete,
   rich, rife, riotous, running over, seminal, spacious,
   superabundant, swarming, tautologous, teeming, thriving, uberous,
   voluminous, wealthy, well-found, well-furnished, well-provided,
   well-stocked, wholesale, wide