DEDENDUMS is a playable word

dedendum Scrabble® Dictionary

noun
pl. dedendums or dedenda
the root of a gear tooth
127 Playable Words can be made from "DEDENDUMS"
   2-Letter Words (12 found)
   3-Letter Words (27 found)
   7-Letter Words (5 found)
   8-Letter Words (1 found)
   9-Letter Words (1 found)