solifluction - spudding shoe
- spoil heap
- spoil heap edge
- spoil hear
- spoil reclaiming
- spoil-bank conveyer
- spoil-heap formation system
- spoil-heap rail-track
- spoil-heap settlement
- spoil-hear incline
- spoke
- spondylium
- spondyloid
- spong
- sponge
- sponge boundary
- sponge hematite
- sponge horizon in limestone
- sponge spicute
- sponge structure
- spongeous