What It Scores
RHUMB is a valid word in the tournament list this site uses. Tile values only, before any premium square: 12 in Scrabble and 14 in Words With Friends. The letters break down as R1 H4 U1 M3 B3.
Words Made From The Letters In RHUMB
13 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.
4 letter words (1)
3 letter words (7)
2 letter words (5)
Longer Words Containing RHUMB
RHUMB 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.