Words with 'ter' at the start and 'n' at the end

In total, how many words are possible to make using this combination of letters?
A maximum of 44 words!

What's the longest word you can make with words that start with 'ter' and end with 'n'?
The longest word is 18 letters, which is 'territorialisation'.

What is an unusual word on this page of words that start with 'ter' and end with 'n'?
'Tergiversation' certainly stands as the most weird word in our list of words that start with 'ter' and end with 'n'. The accepted definition of 'tergiversation' is as follows: "1. The act of tergiversating; a shifting; shift; subterfuge; evasion. Writing is to be preferred before verbal conferences, as being freer from passions and tergiversations. Abp. Bramhall. 2. Fickleness of conduct; inconstancy; change. The colonel, after all his tergiversations, lost his life in the king's service. Clarendon.".

What is the most common word on this page?
As far as well-known words go, there's 'terrain' which ranks as the 24579^th most popular word.

What's the highest score you could get in Scrabble using this list of words with 'ter' at the start and 'n' at the end?
From this combination of letters, it is possible to make 'terceron' scoring 10 points.