Words that contain 'ad' and end in 'sh'

What is the highest scoring word you can play in Scrabble ?
For a total of 18 points, it's possible to play 'headfish'.

What is the most common word that has 'ad' in and ends with 'sh' in the dictionary?
There's 'admonish', which ranks as the 37676^th most common word.

Which word on this page has the largest letter count?
The longest word one can assemble from this list is 'contradistinguish', which has 17 characters.

What is the most interesting word from this list?
The most interesting word based on a recent poll is 'gaddish'. The definition of 'gaddish' is as follows: "Disposed to gad. -- Gad"dish*nes, n. "Gaddishness and folly." Abp. Leighton.". Credit to the Cambridge Dictionary.

What is the max number of words one can put together using this combination of letters?
One could create 53 words from this combination.