INITIALS 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
106 Playable Words can be made from "INITIALS"
   2-Letter Words (14 found)
   3-Letter Words (28 found)
   6-Letter Words (3 found)
   7-Letter Words (1 found)
   8-Letter Words (1 found)