EXTENDER is a playable word

extender Scrabble® Dictionary

noun
pl. extenders
a substance added to another substance
68 Playable Words can be made from "EXTENDER"
   2-Letter Words (9 found)
   3-Letter Words (15 found)
   5-Letter Words (9 found)
   6-Letter Words (10 found)
   7-Letter Words (3 found)
   8-Letter Words (1 found)