TRIAL is a playable word

trial Scrabble® Dictionary

verb
trialed, trialing, trials or trialled, trialling, trials
to test something to assess its performance
37 Playable Words can be made from "TRIAL"
   2-Letter Words (9 found)
   3-Letter Words (13 found)
   4-Letter Words (13 found)
   5-Letter Words (2 found)