STIRRUP is a playable word

stirrup Scrabble® Dictionary

noun
pl. stirrups
a support for the foot of a horseman
67 Playable Words can be made from "STIRRUP"
   2-Letter Words (8 found)
   3-Letter Words (23 found)
   4-Letter Words (19 found)
   5-Letter Words (12 found)
   6-Letter Words (3 found)
   7-Letter Words (2 found)