pair
noun
a set of two similar things considered as a unit
Synonymsbracetwo items of the same kind
two people considered as a unit
a poker hand with 2 cards of the same value
verb
form a pair or pairs
“The two old friends paired off”
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?”
occur in pairs
Synonymsgeminatearrange in pairs
“Pair these numbers”
Synonymsgeminateengage in sexual intercourse
“Birds mate in the Spring”
Source: WordNet 3.1, Princeton University