Words that start with 'oin' and contain 'h'

What is the highest scoring word in Scrabble available from this list ?
As there is just to choose from, you're only practical option is 'oinochoe' for a score of 13 points.

How many letters does the longest word from this page contain?
The word 'oinochoai' has 9 characters.

What's the max number of words one can put together from this combination of letters?
From this list of words that start with 'oin' and include 'h', there are 4 fantastic entries that can be selected.