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

• raucler
• rauclest
• raucous
• raucously
• raucousness
• raucousnesses
• raught
• raun
• raunch
• raunched
• raunches
• raunchier
• raunchiest
• raunchily
• raunchiness
• raunchinesses
• raunching
• raunchy
• raunge
• rauns
• Rauwolfia
• RAuxAF
• rav
• ravage
• ravaged