Doubleton is a bridge term that is used to describe a holding of two cards in the same suit. There are many different synonyms for this term, depending on who you ask and what their particular preferences are. Some people might refer to a doubleton as a "pair," while others might call it a "duo" or "twosome." Still, others might use more obscure or specialized terminology, such as "double-brigade" or "twin-set." Ultimately, the most important thing is simply to communicate clearly and effectively with your bridge partner, using terminology that you both understand and agree upon.