Steep-sided is a commonly used term to describe a landscape where the terrain is characterized by a steep slope or incline. However, there are several synonyms that can be used to describe such a terrain, such as precipitous, sheer, abrupt, rugged, and craggy. These words convey a sense of an intense and challenging terrain, making it difficult to navigate. They can also describe the sharp angles and jagged edges that denote an area that is prone to landslides and other natural hazards. No matter the term used, the steep-sided terrain always requires caution and care when navigating to avoid the risk of accidents or injury.