Words that start with 'nat' and contain 's'

In total, how many words is it possible to make using this list?
On this page of words starting with 'nat' that contain 's', there are 62 outstanding combinations which are available.

Is there a distinct word from this page of word that starts with 'nat' and includes 's' which might be thought of as unique?
Undoubtedly one of the most weird words from this list is 'natatores'. 'Natatores''s definition is "The swimming birds. Note: They were formerly united into one order, which is now considered an artifical group.", according to the English dictionary.

What is the most popular word that starts with 'nat' and includes 's' in the dictionary?
The most popular word in the dictionary is 'nations', which happens to be the 1741^st most common word in the dictionary.

In Scrabble, what is the highest number of points possible using words that start with 'nat' and include 's'?
For a score of 13 points, it's possible to play 'nativism'.

How many letters does the longest word on this list contain?
'nationalistically', which consists of 17 characters.