support line

12 LETTERS · STARTS WITH S

support line is a valid 12-letter word worth 15 points in Scrabble and 20 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
S1U1P3P3O1R1T1L1I1N1E1
1 + 1 + 3 + 3 + 1 + 1 + 1 + 0 + 1 + 1 + 1 + 1 =15 PTS
DOUBLE WORD → 30TRIPLE WORD → 45
MEANING

What does support line mean?

1