TRAILER is a playable word

trailer Scrabble® Dictionary

verb
trailered, trailering, trailers
to transport by means of a trailer (a vehicle drawn by another)
117 Playable Words can be made from "TRAILER"
   2-Letter Words (15 found)
   3-Letter Words (32 found)
   6-Letter Words (8 found)
   7-Letter Words (2 found)