Words that contain 'a' and end in 'cal'

How many possible words can you make using this list?
It's possible to derive 1,816 words from the specified letter combination.

What is an unusual word that has 'a' in and ends with 'cal'?
The most interesting word from this page is 'tautophonical'. 'Tautophonical' is defined as "Pertaining to, or characterized by, tautophony; repeating the same sound.", according to the English dictionary.

How many letters are in the biggest word on this page?
'Electroencephalographical', which is made up of 25 letters.

Is there any word on this page that sticks out as the most popular?
The most common word in the dictionary according to our system is 'practical', which is in fact the 2065^th most popular word in the dictionary.

What is the highest score you could get in Scrabble from this list of words that have 'a' in and end with 'cal'?
As there are a sizeable 1,816 entries, you should try 'zodiacal' scoring 20 points.