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

• apple-blight
• apple-blossom
• apple butter
• apple butters
• apple-cart
• apple-carts
• apple-cheeked
• apple-jack
• apple-jacks
• apple-John
• apple-Johns
• apple-knocker
• apple-knockers
• apple of discord
• apple of Sodom
• apple of the eye
• apple-pie
• apple-pie bed
• apple-pie beds
• apple-pie order
• apple-pies
• apple polisher
• apple polishers
• appleringie
• appleringies