drill extension

15 LETTERS · STARTS WITH D

drill extension is a valid 15-letter word worth 22 points in Scrabble and 26 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

D2R1I1L1L1E1X8T1E1N1S1I1O1N1

2 + 1 + 1 + 1 + 1 + 0 + 1 + 8 + 1 + 1 + 1 + 1 + 1 + 1 + 1 =22 PTS

DOUBLE WORD → 44TRIPLE WORD → 66

MEANING

What does drill extension mean?