DIADEMS is a playable word

diadem Scrabble® Dictionary

verb
diademed, diademing, diadems
to adorn with a crown
105 Playable Words can be made from "DIADEMS"
   2-Letter Words (16 found)
   3-Letter Words (28 found)
   6-Letter Words (6 found)
   7-Letter Words (1 found)