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

What is the most popular word on this page?
There's 'arena' which ranks as the 14488^th most common word.

In Scrabble, what is the best score possible using words that have 'a' in and end with 'na'?
With an extensive 687 entries, it's best to opt for 'zanjona' scoring 23 points.

What's an unusual word from the word combos available ?
An example of a weird word from this page is 'pedimana'. 'Pedimana''s definition is "A division of marsupials, including the opossums.", according to the dictionary.

In total, how many words are possible to make using the combination of letters requested?
On this page of words that contain 'a' and end in 'na', there are 687 entries that can be selected.

How many letters does the largest word from this list contain?
The longest word you could construct from words that have 'a' in and end with 'na' is 'pseudoscarlatina', and it consists 16 characters.