Wigs are head coverings made of human or synthetic hair. There are numerous synonyms for the word wigs, including hairpieces, hair extensions, hair systems, toupees, and falls. Hairpieces are small wigs that cover specific areas of the scalp, while hair extensions are used to add length and volume to natural hair. Hair systems refer to wigs that cover the entire scalp and are used by people with complete hair loss. Toupees, on the other hand, are small hairpieces that cover bald areas on the top of the head. Falls are long hairpieces that attach to the back of the natural hair to add volume and length.