The word "kippa" refers to a brimless cap worn by Jewish men for religious reasons. However, there are many synonyms for the word "kippa" that are commonly used by Jewish communities around the world. Some of the more common synonyms include "yarmulke," "skullcap," "kipot," "beanie," and "headcovering." Each of these terms can refer to a traditional kippa worn by observant Jewish men, although some styles may be more common in certain regions or communities. Whether it's called a kippa, yarmulke, or something else entirely, this headcovering plays an important role in Jewish tradition and observance.