What It Scores
FUFF is a valid word in the tournament list this site uses. Tile values only, before any premium square: 13 in Scrabble and 14 in Words With Friends. The letters break down as F4 U1 F4 F4.
Longer Words Containing FUFF
FUFF appears inside each of these, which is what makes it worth knowing as a hook.
Next: the Word Unscrambler for any letters at all. Full entry and definition at Merriam-Webster.