two people or things of the same sort considered together.
a couple of girls were playing marbles
pair,duo,duology,twosome,set of two,match,doublets,twins,brace,span,yoke,two,two of a kind,duplet,dyad,duad,doubleton,twain
link or combine (something) with something else.
a sense of hope is coupled with a palpable sense of loss
combine,integrate,mix,incorporate,accompany,link,team,associate,connect,ally,add to,join to,conjoin