Words with 'a' at the start and 'yr' at the end

What's the total number of words you could construct from this combination of letters?
One could derive 2 words with the specified combination.

In Scrabble, what's the highest possible score you can get from words that start with 'a' and end with 'yr'?
With only a few words to choose from, you can only play 'amobyr' which totals 13 points.

What is the largest word you can create from words that start with 'a' and end with 'yr'?
The biggest word that's possible to derive from the specified combination is 'antimartyr', and it contains 10 characters.