Words with 'cha' at the start and 'p' at the end

Which word that starts with 'cha' and ends with 'p' is the most common word?
'Chap' is the most popular word from this list, ranked 6154^th most common word.

In Scrabble, what's the highest possible score possible from words with 'cha' at the start and 'p' at the end?
One could make 'champ' which scores 14 points in Scrabble.

What's the longest word you can assemble with the combination specified?
'Chamberlainship'

Is there a distinct word from this page of word that starts with 'cha' and ends with 'p' which might be considered as unusual in any manner?
Dictionarypedia thinks 'chairmanship' to be the most weird word you can put together. According to the dictionary, 'chairmanship' is defined as "The office of a chairman of a meeting or organized body.".

What is the total number of words you can put together from this combination of letters?
It's possible to make 14 words with the specified combination.