RIMROCKS is a playable word

rimrock Scrabble® Dictionary

noun
pl. rimrocks
a type of rock formation
93 Playable Words can be made from "RIMROCKS"
   2-Letter Words (11 found)
   3-Letter Words (32 found)
   6-Letter Words (2 found)
   7-Letter Words (1 found)
   8-Letter Words (1 found)