The concept of de-materialization refers to the reduction of material possessions or the transition from a physical to a digital form. Therefore, antonyms for de-materialization would be related to the material or physical world. Some of the antonyms for de-materialization can be the terms such as tangible, substantive, material, substantial, or concrete. These terms denote the existence of physical assets and corporeal objects. They imply the presence of something that can be seen, touched, or felt, unlike the digital assets that are the result of de-materialization. Furthermore, antonyms for de-materialization can include words like clutter, bulk, and heap, which signify the physical accumulation of objects.