pairing
From Longman Business Dictionarypairingpair‧ing /ˈpeərɪŋˈper-/ noun1[countable] two people or things that work togetherThe new engine represents an effective pairing of two highly complementary technologies.2[uncountable] the act of putting two people or things togetherThe pairing of the two organizations will accelerate innovation throughout the industries serviced by each organization.