commutator filling

18 LETTERS · STARTS WITH C

commutator filling is a valid 18-letter word worth 27 points in Scrabble and 35 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

C3O1M3M3U1T1A1T1O1R1F4I1L1L1I1N1G2

3 + 1 + 3 + 3 + 1 + 1 + 1 + 1 + 1 + 1 + 0 + 4 + 1 + 1 + 1 + 1 + 1 + 2 =27 PTS

DOUBLE WORD → 54TRIPLE WORD → 81

MEANING

What does commutator filling mean?