Double feature is a term used to describe a pair of films that are shown back-to-back in a movie theater or on television. However, there are several synonyms for the term double feature which can be used interchangeably. These synonyms include twin bill, dual billing, double bill, double screening, and twofer. The concept of a double feature was popular in the past when theaters would show two movies for the price of one. Nowadays, the term is still used in special events and festivals where two movies are screened in succession. The use of these synonyms offers variety in language and can help to keep communication interesting and diverse.