What It Scores
QUA is a valid word in the tournament list this site uses. Tile values only, before any premium square: 12 in Scrabble and 13 in Words With Friends. The letters break down as Q10 U1 A1.
Longer Words Containing QUA
QUA 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.