pair
noun
°Two similar or identical things taken together; often followed by of.
"I couldn't decide which of the pair of designer shirts I preferred, so I bought the pair."
°Two people in a relationship, partnership (especially sexual) or friendship.
"Spouses should make a great pair."
verb
°To group into sets of two.
"''The wedding guests were paired boy-girl and groom's party-bride's party"
°To bring two (animals, notably dogs) together for mating.
synonyms: duo