Words that contain 've' and end in 'n'

How many letters does the longest word on this list contain?
The biggest word you can assemble from this list is 'overintellectualization', which has 23 letters.

What word that has 've' in and ends with 'n' is the most unique?
Our team feel 'vegetarian' to be the most unusual word you can put together. The definition of 'vegetarian' is as follows: "One who holds that vegetables and fruits are the only proper food for man. Strict vegetarians eat no meat, eggs, or milk. Of or pertaining to vegetarianism; as, a vegetarian diet.". Source Oxford Dictionary.

How many usable words could one make using the combination specified?
It's possible to create 796 words with this list.

In Scrabble, what is the best score you can get from words that have 've' in and end with 'n'?
As there are heaps of words to pick from, your best bet is 'vexation' scoring 18 points overall.

Which word that has 've' in and ends with 'n' is the most popular word in the dictionary?
Ranking as the 140^th most popular word, you will want to make sure you've got 'even' memorized.