Words that start with 'cir' and contain 'a'

How many letters are in the largest word on this page?
The largest word is 19 characters long, which is 'circumparallelogram'.

What's a weird word from this page of words that start with 'cir' and include 'a'?
The most peculiar word in this list is 'circumstantiable'. The standard definition of 'circumstantiable' is as follows: "Capable of being circumstantiated. [Obs.] Jer Taylor.". Source Cambridge Dictionary.

What's the highest scoring word in Scrabble available from this list ?
Given there are an overwhelming 222 entries, we would suggest choosing 'circinal' scoring 12 points in total.

Which word on this page ranks as the most popular?
We can verify that 'circumstances' is the 1039^th most common word.

How many usable words can you make using this combination of letters?
You can make 222 words from the specified letter combination.