The term 'PROTRUDING ROCK' can be summarized by the crossword solution SCAR, which is a four-letter word. A SCAR is a mark left on the surface of a rock after it has been eroded or weathered by natural forces such as wind, water, and ice. This type of rock is often found in areas with high levels of erosion, such as coastal regions. Protuding rocks are those that have been pushed up from the ground due to tectonic activity, and they often stand out from the surrounding landscape.