Words that contain 'w' and end in 'th'

What is the most popular word that has 'w' in and ends with 'th'?
We're able to confirm that 'with' is the 12^th most common word.

In total, how many words are there using this list?
It is possible to create 151 words using the specified letter combination.

Which word that has 'w' in and ends with 'th' is the most unusual?
Standing as the most interesting word on this list is 'swath'. The common definition of 'swath' is as follows: "1. A line of grass or grain cut and thrown together by the scythe in mowing or cradling. 2. The whole sweep of a scythe, or the whole breadth from which grass or grain is cut by a scythe or a machine, in mowing or cradling; as, to cut a...".

What's the highest possible score you're able to get in Scrabble using this list of words that contain 'w' and end in 'th'?
Considering the range of words from which to select, your best choice is 'hawkmoth' scoring 23 points overall.

How many letters are in the longest word from this list?
The biggest word is 16 characters long, which is 'uninterferedwith'.