What It Scores
JUKU is a valid word in the tournament list this site uses. Tile values only, before any premium square: 15 in Scrabble and 19 in Words With Friends. The letters break down as J8 U1 K5 U1.
Longer Words Containing JUKU
JUKU 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.