Words that start with 'ni' and contain 'r'

What is an interesting word from all the word combos available on this list?
An example of a weird word from this list goes to 'nitrogenous'. According to the dictionary, 'nitrogenous' means "of, pertaining to, or resembling, nitrogen; as, a nitrogenous principle; nitrogenous compounds. Nitrogenous foods. See 2d Note under Food, n., 1.".

Is there any word on this page that jumps out as the most popular?
As far as popular words go, there's 'nigger', which is the 12197^th most common word.

In Scrabble, what's the highest number of points possible using words that start with 'ni' and contain 'r'?
Considering the huge selection of words to select from, we'd recommend going for 'nightjar' which scores 19 points.

How many usable words can you make from this combination of letters?
You could create 325 words from the combination you searched for.

How many characters are in the biggest word from this page?
The longest word that's possible to construct from the specified combination is 'nitrotrichloromethane', and it consists of 21 characters.