UNDERLAYING is a playable word

underlay Scrabble® Dictionary

verb
underlaid, underlaying, underlays
to place under
815 Playable Words can be made from "UNDERLAYING"
   2-Letter Words (26 found)
   3-Letter Words (106 found)
   9-Letter Words (5 found)
   10-Letter Words (3 found)
   11-Letter Words (1 found)