Which word in particular from this list has the highest character count?The word 'diphenylaminechlorarsine' has 24 characters.
How many viable words could one put together from this combination of letters?On this page of words with 'rs' in them, you have 11,780 entries which are available overall.
What is the highest scoring word in Scrabble you can play for ?With so many words to decide on, you'll want to try 'quizzers' which scores 35 points.
Which word with 'rs' in them is the most popular word?The most well-known word for your request is 'first'.
What word with 'rs' in them is the most unique?By far the most interesting word in this list is 'undersheriffry'. The general definition of 'undersheriffry' is as follows: "Undershrievalty. [Obs.]". Source Cambridge Dictionary.