What It Scores
NONPROS is a valid word in the tournament list this site uses. Tile values only, before any premium square: 9 in Scrabble and 10 in Words With Friends. The letters break down as N1 O1 N1 P3 R1 O1 S1.
At seven letters this plays a whole rack, which is a bingo and worth 59 in Scrabble once the 50 point bonus lands.
Words Made From The Letters In NONPROS
51 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 (10)
4 letter words (16)
3 letter words (17)
2 letter words (8)
Next: the Word Unscrambler for any letters at all. Full entry and definition at Merriam-Webster.