Words that start with 'i' and contain 'tre'

What's the highest number of points you can get in Scrabble from this list of words starting with 'i' that contain 'tre'?
You can make 'intrench' for a total of 13 in Scrabble.

Which word in particular from this list has the highest character count?
The longest word you could derive from this list is 'imputrescibility', and it is made up of 16 characters.

In total, how many words can one make using these specific combinations of letters?
There are 57 fantastic words you could use for words that start with 'i' and include 'tre'.

Is there an example of a word from this page of word that starts with 'i' and includes 'tre' which could be deemed as interesting?
An example of an unusual word from this list goes to 'inheritress'. It is defined as "A heiress. Milman.".

What's the most common word that starts with 'i' and includes 'tre' in the dictionary?
The most popular word is 'intrepid', which is actually the 19994^th most common word in this list.