Words that start with 'gre' and contain 'a'

In Scrabble, what is the highest number of points you can get from this list of words starting with 'gre' that contain 'a'?
As there are a sizeable 145 entries, we would advise going for 'greyback' scoring 20 points in total.

Which word in particular on this page has the largest letter count?
'greatheartedness', and consists of 16 characters.

Which word that starts with 'gre' and includes 'a' is the most common word in the dictionary?
The most well-known word in the dictionary according to our database is 'great', which is in fact the 92^nd most common word in this list.

What is an unusual word from this page of words that start with 'gre' and include 'a'?
'Greensand' is definitely the most peculiar word in our list of words that start with 'gre' and include 'a'. 'Greensand''s definition is "A variety of sandstone, usually imperfectly consolidated, consisting largely of glauconite, a silicate of iron and potash of a green color, mixed with sand and a trace of phosphate of lime. Note: Greensand is often called marl, because it is a useful fertilizer. The greensand beds of the American Cretaceous...", according to the English dictionary.

What is the total number of words one can construct from this combination of letters?
On this list of words starting with 'gre' that contain 'a', Dictionarypedia has found 145 unique combinations which are available.