Synonyms and related words :
both, bout, brace, contest, couple, couplet, decathlon, distich, double harness, double-header, doubles, doublet, duad, duet, duo, dyad, event, foursome, game, games of chance, go, match, mates, meet, pair, pentathlon, play, play-off, race, runoff, set of two, singles, span, sport, team, the two, threesome, twain, two, yoke