How many viable words could one put together with this list?From this page of words with 'io' at the start and 'y' at the end, you have 7 entries which are available.
How many characters are in the longest word on this list?The biggest word is 15 letters, which is 'ionospherically'.
What is the highest number of points you're able to get in Scrabble from this list of words with 'io' at the start and 'y' at the end?Using this particular combination, it is possible to play 'iodoxy' scoring 17 points.