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

How many letters are in the longest word on this list?
'circumjacencies' (15 characters)

What's the most popular word that has 'ja' in and ends with 's' in the dictionary?
'Jaws' is the most popular word from this list, ranked 9406^th most common word.

In Scrabble, what's the highest possible score possible from this list of words that contain 'ja' and end in 's'?
Since there are a vast 255 entries, we'd advise picking 'jazzers' scoring 32 points in total.

What's an unusual word on this page of words that have 'ja' in and end with 's'?
Our team thinks 'pajamas' to be the most unusual word you can put together. The dictionary defines it as "Originally, in India, loose drawers or trousers, such as those worn, tied about the waist, by Mohammedan men and women; by extension, a similar garment adopted among Europeans, americans, etc., for wear in the dressing room and during sleep; also, a suit consisting of drawers and a loose upper garment...".

How many words could you make using this list?
Overall, one can construct 255 words.