UNDERPINNED is a playable word

underpin Scrabble® Dictionary

verb
underpinned, underpinning, underpins
to support from below
237 Playable Words can be made from "UNDERPINNED"
   2-Letter Words (13 found)
   8-Letter Words (6 found)
   9-Letter Words (1 found)
   11-Letter Words (1 found)