twosome (
http://definr.com/twosome)
n 1: two items of the same kind [syn:
couple,
doubleton,
pair,
twain,
brace,
span,
yoke,
couplet,
distich,
duo,
duet,
dyad,
duad]
2: a pair who associate with one another; "the engaged couple";
"an inseparable twosome" [syn:
couple,
duo,
duet]