What is the total no. of words you're able to put together from words that end with 'spt'?
It's possible to make 2 words with the combination of words that end with 'spt'.
From that end with 'spt', what is the longest word possible to derive?
The longest word is 6 letters, which is claspt.
What's the highest possible score you can get in Scrabble using this list of words which end with 'spt'?
With 2 results to choose from, your only viable word is claspt for a score of 10 points.