Is SIBB a valid Scrabble word?
YES — SIBB is a valid Scrabble word 8 points
Scrabble® and Words With Friends® points for SIBB
SIBB is a valid Scrabble US/CAN word worth 8 points:
S1I1B3B3
SIBB is valid in Scrabble UK (World) —
S1I1B3B3
SIBB is a valid Words With Friends word worth 10 points:
S1I1B4B4