RIPRAP is a playable word

riprap Scrabble® Dictionary

verb
riprapped, riprapping, ripraps
to strengthen with a foundation of broken stones
18 Playable Words can be made from "RIPRAP"
   2-Letter Words (4 found)
   3-Letter Words (10 found)
   4-Letter Words (3 found)
   6-Letter Words (1 found)