SUBTLE is a playable word

subtle Scrabble® Dictionary

adjective
subtler, subtlest
so slight as to be difficult to detect
(adverb) subtly
67 Playable Words can be made from "SUBTLE"
   2-Letter Words (7 found)
   3-Letter Words (19 found)
   5-Letter Words (11 found)
   6-Letter Words (6 found)