Is SIST a valid Scrabble word?
YES — SIST is a valid Scrabble word 4 points
Scrabble® and Words With Friends® points for SIST
SIST is a valid Scrabble US/CAN word worth 4 points:
S1I1S1T1
SIST is valid in Scrabble UK (World) —
S1I1S1T1
SIST is not valid in Words With Friends.