Words that include 'rgr'

How many letters are in the biggest word on this list?
The largest word on this page is 'hypergrammaticalness'. It consists of 20 letters.

What is an unusual word from this list?
You can choose a number of interesting words in this list, albeit our favorite word is 'peppergrass'. The definition of 'peppergrass' is as follows: "(a) Any herb of the cruciferous genus Lepidium, especially the garden peppergrass, or garden cress, lepidium sativum; -- called also pepperwort. All the species have a pungent flavor. (B) The common pillwort of Europe (Pilularia globulifera). See Pillwort.".

In Scrabble, what's the best score you can get from words that include 'rgr'?
With a plethora of words to pick from, we'd advise opting for 'forgrown' which scores 15 points.

In total, how many words are possible to make using this combination of letters?
One could create 164 words with the specified combination.

What is the most common word with 'rgr' in them in the dictionary?
As far as well-known words go, there's 'underground', which ranks as the 11773^rd most common word.