Synonyms for the term "derivative work" include adaptation, variation, by-product, interpretation, and reimagining. A derivative work refers to a piece of creative work that is derived or based on an existing work. It often involves transforming the original in terms of medium, content, or style. Adaptation suggests the process of modifying a work to suit a different format or context. A variation involves slight alterations that offer a fresh perspective. By-product implies a spin-off or unintended creation resulting from the original work. Interpretation refers to the act of reinterpreting the original work, adding personal or creative elements. Reimagining suggests a complete re-conception or imaginative overhaul of the source material.