SUPERADDING is a playable word

superadd Scrabble® Dictionary

verb
superadded, superadding, superadds
to add further
1131 Playable Words can be made from "SUPERADDING"
   2-Letter Words (28 found)
   3-Letter Words (135 found)
   9-Letter Words (4 found)
   10-Letter Words (1 found)
   11-Letter Words (1 found)