Words that contain 'tf' and end in 's'

What's the longest word you can construct from this list?
'Unstraightforwardness', which has 21 letters.

Which word that has 'tf' in and ends with 's' is the most popular word in the dictionary?
We've identified that 'forgetfulness' is the 16439^th most common word.

How many acceptable words are possible to make using the specified combination?
It's possible to create 162 words using this list.

What's an interesting word from all the combinations possible on this page?
Undoubtedly one of the most interesting words from this list of words that have 'tf' in and end with 's' is 'startfulness'. 'Startfulness' is defined as "Aptness to start. [R.]", according to the English dictionary.

What is the highest number of points you can get in Scrabble from this list of words that contain 'tf' and end in 's'?
Considering the wide range of words to select from, your best option is 'outfoxes' scoring 18 points.