nouns
two items of the same kind
brace,
couple,
couplet,
distich,
duad,
duet,
duo,
dyad,
pair,
span,
twain,
twosome,
yoke
two performers or singers who perform together
a pair who associate with one another
"the engaged couple"; "an inseparable twosome"
a musical composition for two performers
(ballet) a dance for two people (usually a ballerina and a danseur noble)