What It Scores
FITNESS is a valid word in the tournament list this site uses. Tile values only, before any premium square: 10 in Scrabble and 10 in Words With Friends. The letters break down as F4 I1 T1 N1 E1 S1 S1.
At seven letters this plays a whole rack, which is a bingo and worth 60 in Scrabble once the 50 point bonus lands.
Anagrams of FITNESS (1)
Same letters, different order. Any of these plays the same tiles for the same score.
Words Made From The Letters In FITNESS
134 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.
6 letter words (9)
5 letter words (34)
FEINTFEISTFENISFENTSFESTSFIENTFIESTFINESFISTSINSETNEIFSNEISTNESTSNIEFSNIFESNISSENITESSEIFSSENSISENTISENTSSIENSSIENTSIFTSSINESSITESSNIESSNIFTSNITSSTEINSTENSSTIESTEINSTINES
4 letter words (45)
EFTSESTSFEISFENIFENSFENTFESSFESTFETSFINEFINSFISTFITSNEFSNEIFNESSNESTNETSNIEFNIESNIFENITENITSSEIFSEISSENSSENTSETSSIENSIESSIFTSINESINSSISTSITESITSSNITSTENSTIETEFSTEINTENSTIESTINETINS
3 letter words (32)
2 letter words (14)
Next: the Word Unscrambler for any letters at all. Full entry and definition at Merriam-Webster.