interadditive

13 LETTERS · 5 SYLLABLES · STARTS WITH I

interadditive is a valid 13-letter word worth 18 points in Scrabble and 20 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

I1N1T1E1R1A1D2D2I1T1I1V4E1

1 + 1 + 1 + 1 + 1 + 1 + 2 + 2 + 1 + 1 + 1 + 4 + 1 =18 PTS

DOUBLE WORD → 36TRIPLE WORD → 54

MEANING

What does interadditive mean?