Words with 'dr' at the start and 'u' at the end

What's the highest number of points you're able to get in Scrabble from this list of words beginning with 'dr' and ending with 'u'?
Since there is only a single word to choose from, your only viable word is 'drou' scoring 5 points.

In total, how many words are possible to make using these specific combinations of letters?
On this list of words with 'dr' at the start and 'u' at the end, there is just 1 entry which is available overall.