two·some 
/ˈtu:səm/ noun
plural two·somes /ˈtu:səm/ noun [count] : a group of two people or things
▪ They became a twosome [=couple] after their second year of college. ▪ We were the first twosome out on the golf course this morning.
▪ They became a twosome [=couple] after their second year of college. ▪ We were the first twosome out on the golf course this morning.
