Words that contain 'ca' and end in 'ni'

What's the most common word that has 'ca' in and ends with 'ni'?
'Macaroni' is the most popular word from this page, ranked 35320^th most common word.

How many letters does the largest word from this page contain?
The word 'pleuracanthini' is made up of 14 characters.

What's an interesting word from the combinations possible ?
One of the most peculiar words from this page is 'decani'. The definition of 'decani' is as follows: "Used of the side of the choir on which the dean's stall is placed; decanal; -- correlative to cantoris; as, the decanal, or decani, side.".

In Scrabble, what's the highest score you can get using this list of words containing 'ca' and ending with 'ni'?
One could make 'canzoni' which gets 18 points.

In total, how many words is it possible to make using these specific combinations of letters?
From this list of words that have 'ca' in and end with 'ni', there are 20 amazing combinations which can be selected.