What's the most common word on this page?The most popular word for the combination you requested is 'river'.
How many words are possible to make using the combination requested?From this list of words starting with 'ri' that contain 'r', there are 291 effective entries that can be selected.
What's the largest word you can create using this list?The longest word is 17 characters long, which is 'ribonucleoprotein'.
What word that starts with 'ri' and includes 'r' is the most unusual?One of the most interesting words from this list of words that start with 'ri' and include 'r' is 'rigmarole'. It is defined as "A succession of confused or nonsencial statements; foolish talk; nonsense. [Colloq.] Often one's dear friend talks something which one scruples to call rigmarole. De Quincey. Consisting of rigmarole; frovolous; nonsensical; foolish.".
In Scrabble, what's the highest possible score possible from this list of words that start with 'ri' and include 'r'?Given there are an extensive 291 entries, you may want to try 'rizzar' scoring 24 points overall.