1. 
[syn: ample, copious, plenteous, plentiful, rich]
The Collaborative International Dictionary of English v.0.48:
Plenteous \Plen"te*ous\, a. [From Plenty.]
   1. Containing plenty; abundant; copious; plentiful;
      sufficient for every purpose; as, a plenteous supply.
      "Reaping plenteous crop." --Milton.
      [1913 Webster]
   2. Yielding abundance; productive; fruitful. "The seven
      plenteous years." --Gen. xli. 34.
      [1913 Webster]
   3. Having plenty; abounding; rich.
      [1913 Webster]
            The Lord shall make thee plenteous in goods. --Deut.
                                                  xxviii. 11.
      [1913 Webster]
   Syn: Plentiful; copious; full. See Ample.
        [1913 Webster] -- Plen"te*ous*ly, adv. --
        Plen"te*ous*ness, n.
        [1913 Webster]
WordNet (r) 3.0 (2006):
plenteous
    adj 1: 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:
21 Moby Thesaurus words for "plenteous":
   abundant, ample, bounteous, bountiful, copious, fruitful, full,
   galore, generous, hearty, lavish, liberal, luxurious, opulent,
   plenty, prodigal, profuse, profusive, prolific, rampant, rife