Is OB a valid Scrabble word?
YES — OB is a valid Scrabble word 4 points
Scrabble® and Words With Friends® points for OB
OB is a valid Scrabble US/CAN word worth 4 points:
O1B3
OB is valid in Scrabble UK (World) —
O1B3
OB is not valid in Words With Friends.