ISBA
4 letters✓ Scrabble US (TWL)✓ Scrabble UK (SOWPODS)✓ Words With Friends
6
Scrabble points
7
WWF points
Letter breakdown
i1 pts
s1 pts
b3 pts
a1 pts
Base Scrabble values — premium squares multiply the total.
Words you can make from ISBA's letters
From the TWL dictionary. Use the unscrambler for the full list with all dictionaries.