Words with 'c' as the first letter that end with 'i'

What word that starts with 'c' and ends with 'i' is the most interesting?
There are a number of unusual words on this page, however our favorite word currently is 'ctenoidei'. The general definition of 'ctenoidei' is as follows: "A group of fishes, established by Agassiz, characterized by having scales with a pectinated margin, as in the perch. The group is now generally regarded as artificial.". Source Oxford Dictionary.

In Scrabble, what's the most points possible from this list of words with 'c' as the 1st letter that end with 'i'?
With a plethora of words from which to select, it's best to select 'chakazi' which scores 25 points in total.

Which word that starts with 'c' and ends with 'i' is the most common word in the dictionary?
We've identified that 'chi' is the 13375^th most common word.

How many words is it possible to make using these specific combinations of letters?
It's possible to create 319 words using the specified combination.

How many letters are in the longest word on this page?
The longest word that's possible to construct from the specified combination is 'chondroganoidei', which consists 15 letters.