Words with 'imp' at the start and 'n' at the end

What's the longest word you can derive using this list?
There are 19 characters in the word 'impossibilification', making it the biggest word we have.

What word that starts with 'imp' and ends with 'n' is the most unique?
By far the most peculiar word in this list is 'imperturbation'. It is defined as "Freedom from agitation of mind; calmness; quietude. W. Montagu.".

What's the highest score you're able to get in Scrabble from this list of words with 'imp' at the start and 'n' at the end?
For a total of 14 points, it's possible to play 'impeyan'.

What is the maximum number of words you are able to construct from this combination of letters?
It is possible to assemble 63 words using the specified letter combination.

Is there a word on this page that sticks out as the most popular?
Ranking as the 1870^th most popular word, you will want to ensure you've got 'impression' in your repertoire.