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

• butternut
• butternuts
• butter oil
• butter-paper
• butter pat
• butter pats
• butter plate
• butter-print
• butter-prints
• butters
• butterscotch
• butterscotches
• butter-tree
• butter-trees
• butter up
• butter-wife
• butter-wives
• chimney can
• chimney cans
• chimney-corner
• chimneyed
• chimneying
• chimney-nook
• chimney-nuik
• chimney piece