How many letters does the longest word on this list contain?Try 'wabbliest', which has 9 letters.
How many words could one make from this combination of letters?From this page of words that start with 'wab' and include 't', you have 2 entries which are possible overall.
What's the highest scoring word in Scrabble available on this page ?Your only feasible choice is 'wabster' which totals 12 points.