Twosome
Part of speech: noun
Definition: A group of two
Duet
Part of speech: verb
Definition: To perform a duet.To communicate (warnings, mating calls, etc.) through song.
Part of speech: noun
Definition: A musical composition in two parts, each performed by a single voice (singer, instrument or univoce ensemble).A pair or couple, especially one that is harmonious or elegant.
Example sentence: I am on an album with theater icon Billy Porter called the 'Soul of Richard Rodgers.' Our duet is called 'Carefully Taught.'