SUBSOILING is a playable word

subsoil Scrabble® Dictionary

verb
subsoiled, subsoiling, subsoils
to plow so as to turn up the subsoil (the layer of earth beneath the surface soil)
253 Playable Words can be made from "SUBSOILING"
   2-Letter Words (17 found)
   8-Letter Words (3 found)
   10-Letter Words (1 found)