Two of a kind is a phrase used to describe two people or things that are similar in some way. It can be used to refer to a PAIR, a BRACE, a SET, a COUPLE, a DUO, a COUPLET, a DYAD, or birds of a feather. A PAIR is two people or things that are the same. A BRACE is two people or things that are connected or held together. A SET is two or more people or things that are grouped together. A COUPLE is two people who are in a romantic relationship. A DUO is two people or things that are working together. A COUPLET is two lines of poetry that rhyme and have the same meter. A DYAD is two people or things that are closely related. Birds of a feather are two people who have similar interests or characteristics.