The Collaborative International Dictionary of English v.0.48:

Gamesome \Game"some\ (g[=a]m"s[u^]m), a.
   Gay; sportive; playful; frolicsome; merry. --Shak.
   [1913 Webster]

         Gladness of the gamesome crowd.          --Byron.
   -- Game"some*ly, adv. -- Game"some*ness, n.
   [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

30 Moby Thesaurus words for "gamesome":
   animated, antic, capersome, coltish, exuberant, frisky, frolicsome,
   full of beans, gay, hearty, larkish, lively, mischievous, playful,
   prankish, pranky, rollicking, rollicksome, rompish, skittish,
   spirited, sportful, sportive, sprightly, vital, vivacious, waggish,
   wicked, zestful, zippy