SHUTTLE is a playable word

shuttle Scrabble® Dictionary

verb
shuttled, shuttling, shuttles
to move or travel back and forth
65 Playable Words can be made from "SHUTTLE"
   2-Letter Words (10 found)
   3-Letter Words (21 found)
   5-Letter Words (4 found)
   6-Letter Words (3 found)
   7-Letter Words (1 found)