SHIRR is a playable word

shirr Scrabble® Dictionary

verb
shirred, shirring, shirrs
to draw into three or more parallel rows, as cloth
9 Playable Words can be made from "SHIRR"
   2-Letter Words (4 found)
   3-Letter Words (3 found)
   4-Letter Words (1 found)
   5-Letter Words (1 found)