Waste reuse is a concept that focuses on reducing waste and conserving resources by finding alternative uses for materials that would otherwise be discarded. There are several synonyms for this term, including upcycling, repurposing, and recycling. Upcycling involves taking materials that are no longer useful in their original form and transforming them into something new and valuable. Repurposing involves finding a new use for materials that were intended for a different purpose. Recycling involves breaking down materials to create new products. All of these concepts contribute to the goal of waste reduction and sustainability. By reusing materials, we can reduce the amount of waste that ends up in landfills and conserve valuable resources.