Noun

• S: (n) pair (pair%1:14:01::), brace (brace%1:14:00::) (a set of two similar things considered as a unit)
• S: (n) couple (couple%1:23:00::), pair (pair%1:23:00::), twosome (twosome%1:23:00::), twain (twain%1:23:00::), brace (brace%1:23:00::), span (span%1:23:02::), yoke (yoke%1:23:00::), couplet (couplet%1:23:00::), distich (distich%1:23:00::), duo (duo%1:23:00::), duet (duet%1:23:00::), dyad (dyad%1:23:00::), duad (duad%1:23:00::) (two items of the same kind)
• S: (n) pair (pair%1:14:00::) (two people considered as a unit)
• S: (n) pair (pair%1:14:02::) (a poker hand with 2 cards of the same value)

Verb

• S: (v) pair (pair%2:41:00::), pair off (pair_off%2:41:00::), partner off (partner_off%2:41:00::), couple (couple%2:41:00::) (form a pair or pairs) "The two old friends paired off"
• S: (v) match (match%2:35:08::), mate (mate%2:35:02::), couple (couple%2:35:02::), pair (pair%2:35:01::), twin (twin%2:35:00::) (bring two objects, ideas, or people together) "This fact is coupled to the other one"; "Matchmaker, can you match my daughter with a nice young man?"; "The student was paired with a partner for collaboration on the project"
• S: (v) pair (pair%2:35:04::), geminate (geminate%2:35:01::) (occur in pairs)
• S: (v) pair (pair%2:35:03::), geminate (geminate%2:35:00::) (arrange in pairs) "Pair these numbers"
• S: (v) copulate (copulate%2:35:00::), mate (mate%2:35:00::), pair (pair%2:35:00::), couple (couple%2:35:00::) (engage in sexual intercourse) "Birds mate in the Spring"