The Collaborative International Dictionary of English v.0.48:

Puck \Puck\, n. [OE. pouke; cf. OSw. puke, Icel. p[=u]ki an evil
   demon, W. pwca a hobgoblin. Cf. Poker a bugbear, Pug.]
   1. (Medi[ae]val Myth.) A celebrated fairy, "the merry
      wanderer of the night;" -- called also Robin Goodfellow,
      Friar Rush, Pug, etc. --Shak.
      [1913 Webster]

            He meeteth Puck, whom most men call
            Hobgoblin, and on him doth fall.      --Drayton.
      [1913 Webster]

   2. (Zool.) The goatsucker. [Prov. Eng.]
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Puck \Puck\, n.
   A disk of vulcanized rubber used in the game of hockey, as
   the object to be driven through the goals.
   [Webster 1913 Suppl.]

WordNet (r) 3.0 (2006):

Puck
    n 1: a mischievous sprite of English folklore [syn: Puck,
         Robin Goodfellow]
    2: a vulcanized rubber disk 3 inches in diameter that is used
       instead of a ball in ice hockey [syn: puck, hockey puck]

Moby Thesaurus II by Grady Ward, 1.0:

21 Moby Thesaurus words for "Puck":
   Dingbelle, Fifinella, Hob, Hobgoblin, bad fairy, bad peri,
   deviling, devilkin, diablotin, elf, erlking, gremlin, imp, kobold,
   little devil, pixie, poltergeist, puck, sprite, tokoloshe,
   young devil



Moby Thesaurus II by Grady Ward, 1.0:

60 Moby Thesaurus words for "puck":
   Dingbelle, Fifinella, Hob, Hobgoblin, JD, Puck, bad boy, bad fairy,
   bad peri, booger, brat, buffoon, bugger, cutup, devil, deviling,
   devilkin, diablotin, elf, enfant terrible, erlking, funmaker,
   gamin, gremlin, holy terror, hood, hoodlum, hooligan, imp, joker,
   jokester, juvenile delinquent, knave, kobold, little devil,
   little monkey, little rascal, minx, mischief, mischief-maker,
   pixie, poltergeist, practical joker, prankster, punk, punk kid,
   rapscallion, rascal, rogue, rowdy, ruffian, scamp, scapegrace,
   spoiled brat, sprite, tokoloshe, urchin, wag, whippersnapper,
   young devil