What It Scores
JA is a valid word in the tournament list this site uses. Tile values only, before any premium square: 9 in Scrabble and 11 in Words With Friends. The letters break down as J8 A1.
Longer Words Containing JA
JA appears inside each of these, which is what makes it worth knowing as a hook.
ADJACENCEADJACENCESADJACENCYADJACENTADJACENTLYADJACENTSAJARALFORJAALFORJASAMBERJACKAMBERJACKSANTIHIJACKANTIJAMAPPLEJACKAPPLEJACKSBAJADABAJADASBAJANBAJANSBANJAXBANJAXEDBANJAXESBANJAXINGBEJABBERSBEJABERSBEJADEBEJADEDBEJADESBEJADINGBEJANTBEJANTSBENJAMINBENJAMINSBHAJANBHAJANSBLACKJACKBLACKJACKSBLUEJACKBLUEJACKETBLUEJACKS
Next: the Word Unscrambler for any letters at all, and the two and three letter lists. Full entry and definition at Merriam-Webster.