action extension

16 LETTERS · STARTS WITH A

action extension is a valid 16-letter word worth 24 points in Scrabble and 28 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

A1C3T1I1O1N1E1X8T1E1N1S1I1O1N1

1 + 3 + 1 + 1 + 1 + 1 + 0 + 1 + 8 + 1 + 1 + 1 + 1 + 1 + 1 + 1 =24 PTS

DOUBLE WORD → 48TRIPLE WORD → 72

MEANING

What does action extension mean?