Words that start with 'h' and contain 'nta'

Which word that starts with 'h' and includes 'nta' is the most popular word in the dictionary?
'Horizontal' is the most well-known word from this that start with 'h' and include 'nta', ranked 10750^th most common word.

How many words could one put together from this list?
In total, one could choose from up to 40 words.

Is there a word from this page which might be thought of as unique?
Our team considers 'hyomental' to be the most peculiar word you can assemble. The definition of 'hyomental' is as follows: "Between the hyoid bone and the lower jaw, pertaining to them; suprahyoid; submaxillary; as, the hyomental region of the front of the neck.". Credit to the Oxford Dictionary.

What's the longest word you can derive with this list?
The largest word is 21 letters long, which is 'heterotransplantation'.

In Scrabble, what is the most points you can get from this list of words that start with 'h' and include 'nta'?
For a total of 17 points in Scrabble, one can use 'huntaway'.