rip-rap or riprap /ripˈrap/

1. Loose broken stones, used to form a foundation on soft ground or under water, or in the construction of revetments and embankments
2. A foundation formed of these

• covins
• covin-tree
• covin-trees
• covyne
• covynes
• cow
• cowage
• cowages
• cowal
• cowals
• cowan
• cowans
• coward
• cowarded
• cowardice
• cowardices
• cowarding
• cowardliness
• cowardlinesses
• cowardly
• cowardree
• cowardrees
• cowardries
• cowardry
• cowards