What It Scores
FOISTS is a valid word in the tournament list this site uses. Tile values only, before any premium square: 9 in Scrabble and 9 in Words With Friends. The letters break down as F4 O1 I1 S1 T1 S1.
Words Made From The Letters In FOISTS
39 shorter words come out of these tiles. On a board that matters more than the long play, because a short word on a premium square often beats a long one on plain squares.
5 letter words (4)
4 letter words (10)
3 letter words (13)
2 letter words (12)
Next: the Word Unscrambler for any letters at all. Full entry and definition at Merriam-Webster.