combination door

16 LETTERS · STARTS WITH C

combination door is a valid 16-letter word worth 22 points in Scrabble and 27 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

C3O1M3B3I1N1A1T1I1O1N1D2O1O1R1

3 + 1 + 3 + 3 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 0 + 2 + 1 + 1 + 1 =22 PTS

DOUBLE WORD → 44TRIPLE WORD → 66

MEANING

What does combination door mean?