Synonyms for duet

two items of the same kind (noun)

• couple
• pair
• twosome
• twain
• brace
• span
• yoke
• couplet
• distich
• duo
• dyad
• duad

two performers or singers who perform together (noun)

• duette

(ballet) a dance for two people (usually a ballerina and a danseur noble) (noun)