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

• gannetry
• gannets
• gannister
• gannisters
• ganoid
• Ganoidei
• ganoids
• ganoin
• ganoine
• ganoines
• ganoins
• gansey
• ganseys
• gant
• ganted
• ganting
• gantlet
• gantline
• gantlines
• gantlope
• gantlopes
• gantries
• gantry
• gantry crane
• gantry cranes