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

• peperonis
• pepful
• pepino
• pepinos
• pepla
• peplos
• peploses
• peplum
• peplums
• peplus
• pepluses
• pepo
• pepos
• pepped
• pepper
• pepper-and-salt
• pepper box
• pepper boxes
• pepper-cake
• pepper-caster
• pepper-casters
• pepper-castor
• peppercorn
• peppercorns
• peppercorny