A head-piece is an accessory worn on the head to either protect the head or add to one's appearance. The term 'head-piece' can refer to a variety of things such as hats, headbands, tiaras, crowns, caps, helmets, and visors. Synonyms for the word 'head-piece' include headdress, headgear, headwear, cap, bonnet, beret, beanie, fedora, turban, and sombrero. Depending on the context, different words may be used for head-pieces, such as a helmet for protection during a sport or a tiara for a formal event. Whatever the case may be, head-pieces are an essential part of fashion and function in the modern-day world.