Landslip
/ˈlændslɪp/
Definition 1 of 1
Pro Tip 1/3Visualize the Scene
Imagine a large area of land falling down a slope; it helps grasp the scale and suddenness of a landslip. 
The landslip sent boulders and trees crashing down into the valley.
Pro Tip 2/3Natural Disasters
Landslip is often used in the context of natural disasters or unstable geological areas. 
The village was evacuated due to a possible landslip after the earthquake.
Pro Tip 3/3Safety and Warning
The word can convey danger and is associated with warnings about unstable terrain or during heavy rains. 
Signs warned of a potential landslip along the hiking trail.