SOFTER is a playable word

soft Scrabble® Dictionary

adjective
softer, softest
yielding readily to pressure
noun
pl. softs
a soft object or part
86 Playable Words can be made from "SOFTER"
   2-Letter Words (13 found)
   3-Letter Words (27 found)
   5-Letter Words (13 found)
   6-Letter Words (5 found)