SOLOING is a playable word

solo Scrabble® Dictionary

noun
pl. solos or soli
a musical composition for a single voice or instrument
verb
soloed, soloing, solos or soloes
to perform alone
99 Playable Words can be made from "SOLOING"
   2-Letter Words (12 found)
   3-Letter Words (21 found)
   7-Letter Words (4 found)