INITIALLING is a playable word

initial Scrabble® Dictionary

verb
initialed, initialing, initials or initialled, initialling, initials
to mark with the first letters of one's name
102 Playable Words can be made from "INITIALLING"
   2-Letter Words (13 found)
   3-Letter Words (26 found)
   5-Letter Words (12 found)
   6-Letter Words (9 found)
   10-Letter Words (1 found)
   11-Letter Words (1 found)