The Collaborative International Dictionary of English v.0.48:

bingo \bingo\ n.
   a game commonly used for low-stakes gambling, in which
   numbered balls or slips are drawn at random and players cover
   the correponding numbers on their cards, called Bingo cards,
   which have square arrangement of such numbers. Each card has
   a different arrangement of the numbers, and the first player
   to cover all numbers in one row (horizontal, vertical, or
   diagonal) is the winner, usually announcing that fact by a
   cry of "Bingo!"

   Note: Variants of the game may require that all peripheral
         numbers are covered, to form a box, or other figure.
         The numbers usually have one letter from the group "B",
         "I", "N", "G", and "O", plus two digits. The "cards"
         may be disposable sheets of paper on which the numbers
         are printed.

   Syn: lotto, beano, keno.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

bingo
    n 1: a game in which numbered balls are drawn at random and
         players cover the corresponding numbers on their cards
         [syn: lotto, bingo, beano, keno]

Moby Thesaurus II by Grady Ward, 1.0:

152 Moby Thesaurus words for "bingo":
   Monopoly, Ping-Pong, Rugby, Scrabble, archery,
   association football, backgammon, badminton, bagatelle, ball,
   bandy, baseball, basketball, battledore and shuttlecock, beano,
   billiards, bowling, bowls, boxing, card games, cat, catch,
   charades, checkers, chess, chuck and toss, chuck farthing,
   chuck-a-luck, class lottery, climbing, crack-loo, crambo,
   crap game, crap shooting, craps, cricket, croquet, curling, discus,
   dominoes, draft lottery, draughts, drawing, fishing, fives,
   football, ghost, gliding, go, golf, grab bag, handball, hazard,
   hide-and-seek, hiking, hockey, hopscotch, horse racing, horseshoes,
   hunting, hurdling, ice hockey, interest lottery, jacks, jackstones,
   jackstraws, keno, lacrosse, lawn tennis, leapfrog, lottery, lotto,
   luging, marbles, merels, motorcycling, mountaineering,
   mumble-the-peg, ninepins, number lottery, numbers pool, pall-mall,
   pallone, pelota, pinball, pitch and toss, policy, polo, pool,
   post office, pushball, pyramids, quintain, quoits, racquets,
   raffle, riding, roller skating, rouge et noir, roulette, rounders,
   rowing, sailing, sailplaning, sculling, shell game, shinny,
   shooting, shot-put, shuffleboard, skating, skeet, skeet shooting,
   ski-jumping, skiing, skin-diving, skittles, sledding, snooker,
   snorkel diving, snowmobiling, soccer, softball, sports, squash,
   stickball, surfing, sweep, sweepstake, sweepstakes, table tennis,
   tennis, tenpins, tent pegging, tetherball, the numbers,
   the numbers game, ticktacktoe, tiddlywinks, tilting, tipcat,
   tivoli, tobogganing, tombola, tontine, trapshooting,
   trente-et-quarante, tug of war, volleyball, water polo,
   waterskiing, wrestling