The Collaborative International Dictionary of English v.0.48:

Oat \Oat\ ([=o]t), n.; pl. Oats ([=o]ts). [OE. ote, ate, AS.
   [=a]ta, akin to Fries. oat. Of uncertain origin.]
   1. (Bot.) A well-known cereal grass (Avena sativa), and its
      edible grain, used as food and fodder; -- commonly used in
      the plural and in a collective sense.
      [1913 Webster]

   2. A musical pipe made of oat straw. [Obs.] --Milton.
      [1913 Webster]

   Animated oats or Animal oats (Bot.), A grass (Avena
      sterilis) much like oats, but with a long spirally
      twisted awn which coils and uncoils with changes of
      moisture, and thus gives the grains an apparently
      automatic motion.

   Oat fowl (Zool.), the snow bunting; -- so called from its
      feeding on oats. [Prov. Eng.]

   Oat grass (Bot.), the name of several grasses more or less
      resembling oats, as Danthonia spicata, Danthonia
      sericea, and Arrhenatherum avenaceum, all common in
      parts of the United States.

   To feel one's oats,
      (a) to be conceited or self-important. [Slang]
      (b) to feel lively and energetic.

   To sow one's wild oats, to indulge in youthful dissipation.
      --Thackeray.

   Wild oats (Bot.), a grass (Avena fatua) much resembling
      oats, and by some persons supposed to be the original of
      cultivated oats.
      [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

89 Moby Thesaurus words for "oats":
   Bengal grass, English rye grass, Italian rye grass,
   Kentucky bluegrass, alfilaria, bamboo, barley, beach grass,
   beard grass, bent, bent grass, bird seed, black bent, bluegrass,
   bog grass, bran, buckwheat, buffalo grass, bulrush, bunch grass,
   canary grass, cane, cat food, chicken feed, chop, corn,
   cotton grass, crab grass, dog food, eatage, ensilage,
   feather grass, feed, flyaway grass, fodder, forage,
   four-leaved grass, grain, grasses, hassock grass, hay, horsetail,
   little quaking grass, lovegrass, maize, mash, meadow fescue,
   meadow foxtail, meadow grass, meal, millet, myrtle grass, paddy,
   palm-leaved grass, pampas grass, papyrus, pasturage, pasture,
   peppergrass, pet food, provender, reed, ribbon grass, rice, rush,
   rye, scratch, scratch feed, scutch, sedge, sesame, sesame grass,
   silage, slops, sorghum, straw, striped grass, sugar cane, swill,
   switch grass, sword grass, tufted hair grass, wheat, wild oats,
   wire grass, woolly beard grass, worm grass, zebra grass, zoysia



V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

OATS
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