Words that start with 'tu' and contain 't'

Which word that starts with 'tu' and includes 't' is the most common word?
We're able to verify that 'tumult' is the 7305^th most common word.

What's the maximum number of words you could make using this combination of letters?
You can choose from up to 399 words.

Is there a specific word from this page of word that starts with 'tu' and includes 't' which might be considered as unique in any respect?
Standing as our favorite interesting word on this page is 'turbot'. The dictionary defines it as "(a) A large European flounder (Rhombus maximus) highly esteemed as a food fish. It often weighs from thirty to forty pounds. Its color on the upper side is brownish with small roundish tubercles scattered over the surface. The lower, or blind, side is white. Called also bannock fluke. (B) Any...".

How many letters are in the longest word from this list?
'Turbinatocylindrical' is made up of 20 letters, and is the longest word possible to make from this combination.

What's the best score you can get in Scrabble from this list of words that start with 'tu' and include 't'?
Since there are an extensive 399 entries, it's best to go for 'turbojet' which scores 17 points.