In total, how many words is it possible to make using these specific combinations of letters?You could make 3 words using the combination you asked for.
What's the highest scoring word in Scrabble available from this list ?Your only viable option is 'lefsen' which totals 9 points.
What is the biggest word you can assemble with words that have 'fs' in and end with 'en'?The longest word is 9 characters long, which is 'offscreen'.