Groups of two are a common occurrence in many aspects of life, and there are several words used to describe them. The term 'PAIRS' is a five-letter word used to refer to two people or things that are closely associated with each other. 'DUOS' is a four-letter word used to describe two people or things that are together. 'Dyads' is a five-letter word used to refer to two people or things that are related in some way. Finally, 'duads' is a five-letter word used to describe two people or things that are linked together. All of these terms can be used to describe groups of two.