The word "roisters" comes from the old English word "roister", which means to behave loudly and boisterously. There are several synonyms that can be used in place of "roisters", such as carouse, revel, frolic, and cavort. These words all describe a manner of merrymaking, often with a heavy emphasis on drinking or other indulgences. Other synonyms for "roisters" include carol, sing, chant, and serenade, which more specifically describe activities involving music and song. Whether celebrating in a festive or musical fashion, the word "roisters" is versatile and can describe a wide variety of lively and enthusiastic behavior.