OUTSPELLING is a playable word

outspell Scrabble® Dictionary

verb
outspelled or outspelt, outspelling, outspells
to surpass in spelling
984 Playable Words can be made from "OUTSPELLING"
   2-Letter Words (31 found)
   3-Letter Words (120 found)
   9-Letter Words (6 found)
   10-Letter Words (1 found)
   11-Letter Words (1 found)