Organic debris refers to any material that comes from living organisms and may include things like leaves, twigs, and dead plants or animals. There are several synonyms that can be used to describe organic debris, including plant litter, forest detritus, and natural waste. Other phrases that can be used to describe organic debris might include biological matter, decomposing organic matter, or organic residue. It's important to note that organic debris is an essential component of healthy ecosystems, as it provides nutrients and supports the growth of new organisms. However, excessive amounts of organic debris can lead to problems like soil erosion and the spread of disease, so it's important to manage it appropriately in natural environments.