Open English Wordnet
Nouns
(n)couple, pair, twosome, twain, brace, span, yoke, couplet, distich, duo, duet, dyad, duadtwo items of the same kind (n)duet, duette, duotwo performers or singers who perform together (n)couple, twosome, duo, dueta pair who associate with one another“the engaged couple”,
“an inseparable twosome” (n)pas de deux, duet(ballet) a dance for two people (usually a ballerina and a danseur noble)