Interleaves are an essential aspect of printing and bookbinding. The word 'interleave' refers to the process of placing pages or sheets between other pages or sheets. These pages or sheets are often used as a buffer or separator. They may also contain additional information or illustrations. Some synonyms for interleaves include separator, divider, insert, addition, supplement, and page marker. These words all describe a paper or sheet that is added to a book or document to provide structure, definition, or additional content. Interleaves are an important part of the printing world, ensuring that documents are orderly, easy to read, and visually appealing.