SOLUBLE is a playable word

soluble Scrabble® Dictionary

noun
pl. solubles
something that is soluble (capable of being dissolved)
70 Playable Words can be made from "SOLUBLE"
   2-Letter Words (9 found)
   3-Letter Words (19 found)
   5-Letter Words (13 found)
   6-Letter Words (5 found)
   7-Letter Words (3 found)