OUTSLEEPING is a playable word

outsleep Scrabble® Dictionary

verb
outslept, outsleeping, outsleeps
to sleep later than
1069 Playable Words can be made from "OUTSLEEPING"
   2-Letter Words (31 found)
   3-Letter Words (125 found)
   9-Letter Words (5 found)
   11-Letter Words (1 found)