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

• dozing
• dozings
• dozy
• Doña
• DP
• DPH
• DPh.
• DPhil.
• dpi
• DPM
• DPP
• DPRK
• dpt
• DPT
• dr.
• DR
• Dr
• Dr.
• drab
• drabbed
• drabber
• drabbers
• drabbest
• drabbet
• drabbets