HEPTAD is a playable word

heptad Scrabble® Dictionary

noun
pl. heptads
a group of seven
71 Playable Words can be made from "HEPTAD"
   2-Letter Words (15 found)
   3-Letter Words (30 found)
   4-Letter Words (19 found)
   5-Letter Words (6 found)
   6-Letter Words (1 found)