Words with 'nei' at the start and 'r' at the end

Is there a word on this page that sticks out as the most common?
We've identified that 'neither' is the 612^th most common word.

How many letters does the longest word from this list contain?
Consider 'neighbourer'

Is there an example word from this page of word that starts with 'nei' and ends with 'r' that could be deemed as unusual?
The most unusual word based on a recently conducted poll is 'neither'. The definition of 'neither' is as follows: "Not either; not the one or the other. Which of them shall I take Both one or neither Neither can be enjoyed, if both remain alive. Shak. He neither loves, nor either cares for him. Shak. not either; generally used to introduce the first of two or more coördinate clauses of...". Source Cambridge Dictionary.

In Scrabble, what is the most points possible using this list of words with 'nei' at the start and 'r' at the end?
It is possible to make 'neighbor' for a total score of 14 points.

What is the total number of words one is able to assemble using this list?
It is possible to derive 7 words using the specified letter combination.