MISGRADING is a playable word

misgrade Scrabble® Dictionary

verb
misgraded, misgrading, misgrades
to grade incorrectly
325 Playable Words can be made from "MISGRADING"
   2-Letter Words (16 found)
   8-Letter Words (3 found)
   9-Letter Words (1 found)
   10-Letter Words (1 found)