What It Scores
ULU is a valid word in the tournament list this site uses. Tile values only, before any premium square: 3 in Scrabble, 5 in Words With Friends, 5 in Wordfeud. The letters break down as U1 L1 U1.
Longer Words Containing ULU
ULU appears inside each of these, which is what makes it worth knowing as a hook.
Next: the Word Unscrambler for any letters at all, and the two and three letter lists. Full entry and definition at Merriam-Webster.