SEPTUPLE is a playable word

septuple Scrabble® Dictionary

verb
septupled, septupling, septuples
to make seven times as great
111 Playable Words can be made from "SEPTUPLE"
   2-Letter Words (8 found)
   3-Letter Words (28 found)
   6-Letter Words (8 found)
   7-Letter Words (1 found)
   8-Letter Words (1 found)