In total, how many words could one make using the combination requested?From this page of words that contain 'nk' and end in 'as', you have 4 combinations that are possible.
How many letters does the biggest word from this page contain?The word 'banksias' contains 8 characters.
In Scrabble, what's the highest possible score you can get using words that contain 'nk' and end in 'as'?As there are only possible, the only option you can play for is 'banksias' which totals 14 points.