1. coupling, mating, pairing, conjugation, union, sexual union, sexual activity, sexual practice, sex, sex activity
usage: the act of pairing a male and female for reproductive purposes; "the casual couplings of adolescents"; "the mating of some species occurs only in the spring"
1. copulate, mate, pair, couple, join, conjoin
usage: engage in sexual intercourse; "Birds mate in the Spring"
2. match, mate, couple, pair, twin, join, bring together
usage: 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"