added sixth

11 LETTERS · STARTS WITH A

added sixth is a valid 11-letter word worth 23 points in Scrabble and 22 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

A1D2D2E1D2S1I1X8T1H4

1 + 2 + 2 + 1 + 2 + 0 + 1 + 1 + 8 + 1 + 4 =23 PTS

DOUBLE WORD → 46TRIPLE WORD → 69

MEANING

What does added sixth mean?