A head-dress is a piece of clothing that is worn on the head. It is used mostly for aesthetic purposes or to identify a certain group or profession. Some synonyms for the word head-dress are hat, cap, bonnet, turban, crown, tiara, beret, and headdress. These words can be used interchangeably depending on the style and design of the headwear. Hats and caps are typically made of fabric or materials such as straw, and are worn to protect the head from the sun or to keep it warm in colder temperatures. Crowns, tiaras, and headdresses are more decorative and are usually worn by royalty or during special events and ceremonies.