pst needs no unscrambling at all — the three-letter word is already the strongest play its own letters allow, banking 5 points in Scrabble as it stands. In all, 1 valid word comes out of this rack, grouped by length below and checked for Words With Friends as well as Scrabble.
pst is the highest-scoring word from pst, worth 5 points in Scrabble. The top 1 of 1 word is shown here, with the full list organized by length below.
Only one three-letter word uses the letters in pst — and it is pst itself. No unscrambling is needed: the word is already playable as written, worth 5 points in Scrabble.
Swap a single tile in pst and you get a different three-letter rack with its own word list. None of these appear in the results above — they share 2 of the 3 letters, not all of them.
pst is in the NWL, the official Scrabble word list for North America, but not in the Words With Friends dictionary, so it plays in Scrabble only.
Dictionaries record one sense for pst. Scrabble and Words With Friends score tiles and not meanings, so every sense below is worth the same 5 points on a Scrabble board:
pst is the only three-letter word the same letters produce. No arrangement of the same tiles scores higher in Scrabble, so playing pst unchanged also takes the maximum points these letters offer.
The highest-scoring play from these letters is pst, worth 5 points in Scrabble, and no other word from pst earns more points in Scrabble. Words With Friends prices the same letters differently, so the top of the list changes on a Words With Friends board. Both scores count tile values only and exclude premium squares.
The letters in pst produce 1 valid words in the Scrabble and Words With Friends dictionaries. The word count by length is: 1 three-letter word.