mantle cavity

13 LETTERS · STARTS WITH M

mantle cavity is a valid 13-letter word worth 22 points in Scrabble and 26 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

M3A1N1T1L1E1C3A1V4I1T1Y4

3 + 1 + 1 + 1 + 1 + 1 + 0 + 3 + 1 + 4 + 1 + 1 + 4 =22 PTS

DOUBLE WORD → 44TRIPLE WORD → 66

MEANING

What does mantle cavity mean?