Pairing
Part of speech: noun
Definition: The combination or union of two things.
Part of speech: verb
Definition: To group into one or more sets of two.
Union
Part of speech: noun
Definition: The act of uniting or joining two or more things into one, or the state of being united or joined; junction; coalition; combination.That which is united, or made one; something formed by a combination or coalition of parts or members; a confederation; a consolidated body; a league.A joint or other connection uniting parts of machinery, such as pipes.The set containing all of the elements of two or more sets.The act or state of marriage.Sexual intercourse.A data structure that can store any of various items, but only one at a time.
Example sentence: It was the labor movement that helped secure so much of what we take for granted today. The 40-hour work week, the minimum wage, family leave, health insurance, Social Security, Medicare, retirement plans. The cornerstones of the middle-class security all bear the union label.