The "baseball cap" is a commonly used term for a type of hat that has a rounded crown, a stiff brim, and is usually made of cotton or wool. However, there are many other terms that can be used to describe this popular accessory. Some synonyms for "baseball cap" include "dad hat," "snapback," "trucker hat," "bucket hat," and "visor." Each of these terms refers to a specific style or variation of the classic baseball cap. "Dad hat" is a more relaxed version with a curved brim and unstructured crown, while "snapback" has adjustable snaps in the back. "Trucker hat" is characterized by its mesh back and foam front, while "bucket hat" has a wider, downward-sloping brim. "Visor" omits the crown entirely and features only a brim and headband.