STIRPS is a playable word

stirps Scrabble® Dictionary

noun
pl. stirpes
a family or branch of a family
42 Playable Words can be made from "STIRPS"
   2-Letter Words (5 found)
   3-Letter Words (13 found)
   4-Letter Words (12 found)
   5-Letter Words (8 found)
   6-Letter Words (4 found)