Doublure is a French word which means lining. The word has several synonyms, which can be used in place of doublure in different contexts and situations. Some of the synonyms of doublure are backing, lining, interlining, underlining, padding, reinforcement, and support. These words share a similar meaning with doublure and can be used interchangeably in sentences. For example, instead of saying "The doublure of this coat is made of silk," one can also say, "The lining of this coat is made of silk." Using synonyms can help add variety to one's vocabulary and make their communication more effective.