THEORY is a playable word

theory Scrabble® Dictionary

noun
pl. theories
a group of propositions used to explain a class of phenomena
58 Playable Words can be made from "THEORY"
   2-Letter Words (14 found)
   3-Letter Words (24 found)
   4-Letter Words (16 found)
   5-Letter Words (3 found)
   6-Letter Words (1 found)