Is PST a valid Scrabble word?
YES — PST is a valid Scrabble word 5 points
Scrabble® and Words With Friends® points for PST
PST is a valid Scrabble US/CAN word worth 5 points:
P3S1T1
PST is valid in Scrabble UK (World) —
P3S1T1
PST is not valid in Words With Friends.