Synonyms for Canasta:

n.

pontoon, beggar-thy-neighbor. canasta (noun)
basket rummy, meld.
game (noun)
dominoes, shuffleboard, gin, chess, backgammon, snooker, parcheesi, billiards, seven-up, gin rummy, patience, checkers, draughts, cribbage, Skat, rum, Chinese Checkers, horseshoes, straight poker, faro, blind man's bluff, rummy, old maid, solitaire, hearts, marbles, contract bridge, euchre, poker, tiddlywinks, keno, game, quoits, mah-jongg, hopscotch, pinochle, draw poker, bridge, blackjack, whist, stud poker, baccarat, penny ante.
game of chance (noun)
poker, gin rummy, bridge, pinochle, penny ante, gin.

Other synonyms:

beggar-thy-neighbor. pontoon. Other relevant words:
meld, basket rummy, beggar-thy-neighbor, pontoon.