The Collaborative International Dictionary of English v.0.48:

Merrymaking \Mer"ry*mak`ing\, a.
   Making or producing mirth; convivial; jolly.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Merrymaking \Mer"ry*mak`ing\, n.
   The act of making merry; conviviality; merriment; jollity.
   --Wordsworth.
   [1913 Webster]

WordNet (r) 3.0 (2006):

merrymaking
    n 1: a boisterous celebration; a merry festivity [syn:
         merrymaking, conviviality, jollification]

Moby Thesaurus II by Grady Ward, 1.0:

45 Moby Thesaurus words for "merrymaking":
   banquet, celebration, cheer, convivial, conviviality, feast,
   festal, festive, festivity, gaiety, gala, gay, gladsome,
   good cheer, heartiness, hilarious, holiday-making, hoopla,
   jollification, jollity, jolly, jovial, joviality, joyance, joyful,
   joyous, jubilation, larking, mad round, mafficking, merriment,
   merry, on the loose, racketing, regale, regalement, revel,
   reveling, revelment, revelry, revels, round of pleasures,
   skylarking, treat, whoopee