Words that start with 'tr' and contain 'r'

What's a peculiar word from this page?
An example of a strange word from this list goes to 'tractarian'. The dictionary defines it as "One of the writers of the Oxford tracts, called "Tracts for the Times," issued during the period 1833-1841, in which series of papers the sacramental system and authority of the Church, and the value of tradition, were brought into prominence. Also, a member of the High Church party, holding generally...".

Which word from this list has the largest letter count?
The longest word on this list is 'trinitrophenylmethylnitramine'. It is made up 29 letters.

What's the most common word that starts with 'tr' and includes 'r' in the dictionary?
The most well-known word in the dictionary is 'trademark', which is actually the 1417^th most popular word in the dictionary.

In Scrabble, what is the highest score possible from words that start with 'tr' and include 'r'?
As there are so many words to pick from, you should try 'tryworks' which scores 18 points in total.

What is the total number of words you're able to construct using this combination of letters?
All in all, there are up to 1,424 words.