How many characters does the largest word on this list contain?The longest word that's possible to derive from the combination searched for is 'epigonichthys', which contains 13 characters.
What's the highest scoring word in Scrabble you can play for ?One could make 'ichthys' which scores 18 points.
What's an interesting word from this page of words that have 'h' in and end with 'hys'?Ranking as the most weird word on this page is 'pterichthys'. The dictionary defines it as "A genus of Devonian fossil fishes with winglike appendages. The head and most of the body were covered with large bony plates. See Placodermi.".
What's the maximum number of words you're able to make from words that have 'h' in and end with 'hys'?From this list of words that have 'h' in and end with 'hys', you have 15 fantastic entries which are possible.