Words with 'ket' at the start and 'p' at the end

How many viable words can you make using this combination of letters?
From this page of words that start with 'ket' and end with 'p', you have just 1 combination which is available.

What is the highest scoring word you can play in Scrabble ?
As there is only a single word to choose from, the only word you can play for is 'ketchup' for a score of 18 points.