River bank failure, also known as river bank erosion, occurs when the river's bank is unable to withstand the force of the water flow and starts to crumble away. This phenomenon is a significant environmental issue that affects many rivers worldwide. Some synonyms for river bank failure include river bank collapse, river bank degradation, river bank erosion, and river bank instability. These terms are all used to describe the same process of river bank failure, which can lead to property damage, loss of habitats, and even flooding. It's important to stay aware of this phenomenon and take necessary precautions to minimize its impact on local communities and ecosystems.