REDSHIRTING is a playable word

redshirt Scrabble® Dictionary

verb
redshirted, redshirting, redshirts
to keep a college athlete out of varsity play in order to extend his or her eligibility
600 Playable Words can be made from "REDSHIRTING"
   2-Letter Words (20 found)
   9-Letter Words (3 found)
   11-Letter Words (1 found)