Benzofuran is a heterocyclic compound composed of a benzene ring fused with a furan ring. Some of the synonyms for benzofuran that can be used include chromene, coumarone, and dibenzofuran. Chromene is a class of compounds that are structurally similar to benzofuran but contain a double bond in the furan ring. Coumarone, also known as benzopyrone, is another heterocyclic compound that is similar to benzofuran but contains a lactone moiety instead of an oxygen atom in the furan ring. Dibenzofuran is a polycyclic aromatic compound that contains two fused benzene rings and an oxygen atom in the furan ring. All of these synonyms can be used interchangeably with benzofuran in scientific and technical contexts.