Words that start with 'hr' and contain 'x'

In Scrabble, what's the highest score possible from words starting with 'hr' that contain 'x'?
As there is just 1 combination possible, you're obligated to go with 'hrimfaxi' scoring 23 points.

In total, how many words are there using these specific combinations of letters?
We regret to tell you that there is only 1 word.