What's the highest scoring Scrabble word possible?
From this particular combination, one can make which scores points in Scrabble.
How many letters are in the largest word from this list?
The longest word is 17 letters, which is thermodynamically.
What word that starts with 't' and includes 'yna' is the most interesting?
The most interesting word in our opinion is tetradynamia. According to the Oxford dictionary, tetradynamia is defined as "A Linnæan class of plants having six stamens, four of which are longer than the others."
What's the max number of words you can construct from this combination of letters?
From this page of that start with 't' and contain 'yna', you have 22 combinations which can be selected.