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

• zoppo
• Zorb
• Zorbing
• zorgite
• zorgites
• zori
• zoril
• zorilla
• zorillas
• zorille
• zorillo
• zorillos
• zorils
• zorino
• zorinos
• zoris
• Zoroastrian
• Zoroastrianism
• zorro
• zorros
• zoster
• Zostera
• zosters
• Zouave
• Zouaves