Words that contain 'ff' and end in 'ty'

Is there a word on this page that jumps out as the most popular?
The most popular word in the dictionary according to our system is 'difficulty', which is in fact the 1290^th most popular word in the dictionary.

What's the longest word you can derive using this list?
The largest word located by Dictionarypedia is 'ineffervescibility'. It consists of 18 letters.

Is there an example of a word from this page which might be deemed as unusual?
The most unusual word in this list is 'sheriffalty'. The conventional definition of 'sheriffalty' is as follows: "The office or jurisdiction of sheriff. See Shrievalty.". Credit to the Oxford Dictionary.

What is the highest number of points you could get in Scrabble using this list of words containing 'ff' and ending with 'ty'?
For a total of 17 points in Scrabble, you are able to play 'affinity'.

How many acceptable words could one put together using this combination of letters?
On this page of words that have 'ff' in and end with 'ty', there are 36 fantastic entries which can be selected.