plenteous

1. Abundant; copious.
2. Producing or yielding in abundance. See synonyms at plentiful.

[Middle English, alteration of plentivous, from Old French plentiveus, from plentif, from plente, plenty. See plenty.]

adjective

Characterized by abundance: abundant, ample, bounteous, bountiful, copious, generous, heavy, plenitudinous, plentiful, substantial, voluminous. See big/small/amount, give/take/reciprocity, rich/poor.

The adjective has one meaning:

Meaning #1: affording an abundant supply
  Synonyms: ample, copious, plentiful, rich