What It Scores
PYX is a valid word in the tournament list this site uses. Tile values only, before any premium square: 15 in Scrabble and 16 in Words With Friends. The letters break down as P3 Y4 X8.
Longer Words Containing PYX
PYX appears inside each of these, which is what makes it worth knowing as a hook.
Next: the Word Unscrambler for any letters at all, and the two and three letter lists. Full entry and definition at Merriam-Webster.