Nacres is a term commonly used to describe the iridescent coating present on the interior of certain mollusk shells. It is also known as mother-of-pearl. Many synonyms can be used to replace this term, including pearly, opalescent, luminescent and lustrous. Other alternatives may include shimmering, shiny, glistening and sparkling. These words can be used interchangeably to describe the beautiful and striking quality of nacres. They are often used in poetry and literature to add a sense of beauty and elegance to the subject matter. Overall, the synonyms for nacres reflect the endless ways to describe the unique and captivating appearance of these natural wonders.