SUBFLOOR is a playable word

subfloor Scrabble® Dictionary

noun
pl. subfloors
a rough floor laid as a base for a finished floor
104 Playable Words can be made from "SUBFLOOR"
   2-Letter Words (7 found)
   3-Letter Words (27 found)
   6-Letter Words (5 found)
   8-Letter Words (1 found)