keystone joist

14 LETTERS · STARTS WITH K

keystone joist is a valid 14-letter word worth 27 points in Scrabble and 29 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

K5E1Y4S1T1O1N1E1J8O1I1S1T1

5 + 1 + 4 + 1 + 1 + 1 + 1 + 1 + 0 + 8 + 1 + 1 + 1 + 1 =27 PTS

DOUBLE WORD → 54TRIPLE WORD → 81

MEANING

What does keystone joist mean?