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

Is there a word on this page that stands out as the most common?
We can confirm that 'neurasthenia' is the 87379^th most common word.

How many actual words could one put together using the combination specified?
In total, one could create up to 992 words.

What is an unusual word on this page?
One example of an uncommon word from this page goes to 'neoplatonism'. According to the dictionary, 'neoplatonism' means "A pantheistic eclectic school of philosophy, of which Plotinus was the chief (A. D. 205-270), and which sought to reconcile the Platonic and Aristotelian systems with Oriental theosophy. It tended to mysticism and theurgy, and was the last product of Greek philosophy.".

What's the highest scoring word you can play in Scrabble ?
With an extensive 992 entries, it's best to opt for 'nazerini' scoring 17 points in total.

What's the longest word you can construct using this list?
The largest word that's possible to construct from this list is 'naphthylaminesulphonic', and it contains 22 characters.